Take your box cake mix to the next level with this easy recipe! A few simple additions make it extra moist and delicious.
Alright, *almost* scratch cake is a bit of a stretch. It’s mostly a box cake with stuff added in to make it even better.
Some bakers scoff at box mixes, think it’s sacrilege and only bake from scratch. I’m a whatever-works-for-you kinda baker and sometimes it’s just easier to whip out a box.
How to Make Box Cake Better
Adding a few simple ingredients makes a world of difference. Trust me you will never go back to a plain old box cake mix ever again!
Here’s what you’ll need:
- box cake mix
- all-purpose flour
- sugar
- salt
- large eggs
- water (or milk)
- vegetable oil
- vanilla
- sour cream
The sour cream is the secret ingredient I think that makes this doctored box mix extra moist and flavourful.
I recommend using full-fat sour cream because really, we’re not about saving calories at this point, right?
Boxed Cake Mix Recipe
Making this cake is just as simple as any box mix, just with a couple of other ingredients. To make it all you need to do is:
- whisk the dry ingredients together
- add the wet ingredients
- mix on low until combined
This recipe works great for two 8″ cake pans or three 6″ pans. It can be scaled up for larger pans though too. I use this site as a guideline when I’m scaling recipes up or down.
I like to use Homemade Cake Release on my pans and line them with parchment to make sure the cakes come out perfect every time.
I also use Baking Strips around the sides of my cake pans to make sure the cakes bake perfectly flat and don’t require any trimming (no wasted cake scraps!).
If you’d like to make your cake extra moist (or if you’re worried you’ve over baked it) you can add some Simple Syrup to the cooled cake layers. I recommend trimming a bit of the top crust first so the syrup really soaks into the cakes.
These days I mostly bake from scratch, but I used to use this recipe all the time when I was focussing on cake decorating. It bakes up a very sturdy and delicious cake!
I’ve yet to recreate the delicious flavour and texture of a classic vanilla box mix cake though. My Vanilla Cake recipe comes close, but it’s not quite the same. It is delicious though too, so you should try it if you haven’t!
I really like this recipe because it makes the box mixes a little more dense and super moist. This recipe is GREAT for a cake that will be decorated, stacked, etc. as the cakes have really good structural integrity.
I hope you love it as much as I do. Happy Baking!
Easy Buttercream Frosting Recipes:
- Simple Vanilla Buttercream
- Whipped Chocolate Buttercream
- Baileys Chocolate Buttercream
- Cream Cheese Frosting
- Whipped Chocolate Ganache
Frequently Asked Questions
How Can I Convert This Recipe?
- This recipe makes two 8″ or three 6″ cake pans. You can use two 9″ as well but the layers will be thinner (reduce baking time accordingly).
- To make cupcakes, all you need to do is reduce the baking time. Start checking at 15mins or so. The recipe should make about 24 cupcakes depending on size.
- You can bake it in a 9×13 pan. Baking time will be slightly shorter.
- You can bake it in a Bundt pan as well but you’ll need to increase the baking time.
- For all other conversions, I use this site as a guideline.
- Baking time will vary if you change the pan size. Every oven varies so I can’t say for certain what you’ll need to adjust it to. Be sure to check on the cake as it’s baking.
Will This Work With Any Box Cake Mix?
- I’ve only used this method with yellow/white cake mixes, but it should work just fine with any kind of box mix.
- For chocolate cake mixes, instead of adding 1 cup flour, you can add 3/4 cup flour and 1/4 cup cocoa powder if you like.
- For a pure white cake, use a white cake mix and 5 egg whites in place of 3 whole eggs.
- For box mixes, my go-to’s are Betty Crocker and Duncan Hines. The French Vanilla flavour is my favourite.
- You can easily add some sprinkles to make this a funfetti cake instead, but be sure to use either jimmies or confetti as the small round nonpareils will bleed into the batter.
Other Tips for making this Doctored Cake Mix:
- Do not also use the ingredients listed on the back of the box mix. Only the components in the recipe.
- Be sure to use room temperature ingredients as this will yield the best results.
- Use full-fat sour cream for best results. Yogurt is a good substitute as well.
- Learn how to keep your cakes moist using Simple Syrup.
- To help ensure your cake layers bake up nice and flat, check out my Flat Top Cakes post!
How to Make Box Cake Better
Ingredients
- 1 box yellow/white cake mix*
- 1 cup all-purpose flour
- 1 cup granulated sugar
- 1/2 tsp salt
- 3 large eggs room temperature
- 1 1/3 cup water or milk room temperature
- 2 Tbsp vegetable oil
- 1 cup sour cream one 250g carton, room temperature
- 2 tsp vanilla extract
Instructions
- Preheat oven to 325°F.
- Grease and flour two 8" cake rounds (I use Homemade Cake Release), line with parchment.
- Wrap cake rounds with damp Evenbake strips (optional).
- Combine all dry ingredients and whisk together.
- Add wet ingredients and mix until combined. I use my KitchenAid on low for 2 minutes but you can also do this by hand.
- Divide the batter between the pans and bake for approximately 50 minutes.
- Cool in pans on wire rack for 10mins, then turn cakes out onto wire racks to cool completely.
Connie says
Hi there! Thanks for the recipe…anxious to try it! If I want to use two boxes of cake mix, do I double the recipe?
Thanks!
Olivia says
Hi Connie! Yes, double the recipe. Let me know how you like it 🙂
Jill Zimmerman says
I love this recipe! But I live at sea level and want to make this cake whenI travel to see my kids.Which the elevation is about five thousand feet. Do you have any adjustmentsmith’s for altitude? I appreciate your comments.
Jill
Olivia says
Hi Jill! Tweaking recipes for high altitude can be tricky. You will need to make some adjustments to the recipe and it might take some experimentation on your part. I’ve never baked in high altitude, but here are some tips: https://www.kingarthurflour.com/learn/high-altitude-baking.html
Here are some general guidelines if you’re at 3000ft:
• Increase the oven temperature by 15-25F
• Decrease baking time by 5-10mins
• Decrease sugar by 1 Tbsp per cup
• Decrease baking powder by 1/8 tsp per cup
• Increase liquid by 1-2 Tbsp per cup
• Add 1 Tbsp of flour
If you’re higher up than 3000ft, you will need to increase/decrease the ingredients incrementally. Again, it will require some experimentation to get it just right!
Shalese says
Have you ever used buttermilk instead of milk?
Olivia says
Hi Shalese! I haven’t myself and I don’t think I would as there is already sour cream in this recipe.
Ashley says
Love this recipe . Was wondering if I could make 2 dozen cupcakes instead and how long would you bake it for? Thank you.
Olivia says
Hi Ashley! Yes, the recipe works great as cupcakes. I would start checking them at 15mins or so.
Jay says
Do you think I could add blueberries to this recipe?
Olivia says
Hi Jay! I haven’t tried it myself and worry they could sink to the bottom. If you do give it a try make sure to toss the blueberries in flour first and then fold them in gently at the very end. Let me know if you try it!
Megan says
Hello,
How do you feel about carrot cake? Would this work for a boxed spice cake with shredded carrot added in? Thank you.
– Megan
Olivia says
Hi Megan! I haven’t tested adding shredded carrots myself so I can’t say for sure if other recipe adjustments will be needed. I would buy a carrot cake cake mix and use that.
Rhona M says
Thank you… I add sour cream & 3 eggs & use 2 different flavors of vanilla when I use a box cake. I look forward to using your suggestions for box cakes.
Olivia says
I hope you love it!
Christine Sears says
The best doctored box recipe! Our go to!!! Sour cream is the secret ingredient! Thank you so much for this recipe!
Olivia says
Thank you, Christine! I’m glad you love it 🙂
Rosalie comizio says
Do you add your ingredients to the ingredients on the back of the box of cake mix or do you just use your ingredients and just the dry cake mix in the box?
Olivia says
Hi Rosalie! I talk about this in the Tips section right above the recipe: Do not also use the ingredients listed on the back of the box mix. Only the components in the recipe.
Margie C. says
Hi, Should I follow the same recipe above if using a Strawberry cake mix? Also, i will be adding red food coloring to the mix. I am making a flag layer cake.
Thank you.
Olivia says
Hi Margie! Yes, follow the same with a strawberry box cake mix.
Margie C. says
Thank you.
Fiona says
I’m looking at making this for my daughter’s birthday.
If I’m using a wide cake tin (10 inch). Can I use the recipe above and cook it in 1 tin and then repeat again for the second layer (as I only have 1 cake tin?) or do you have to half the recipe in 2 cake tins for consistency and cooking?
Olivia says
Hi Fiona! Converting pan sizes is always tricky. Here are some sites I use as a guideline:
http://www.joyofbaking.com/PanSizes.html
https://www.cookipedia.co.uk/recipes_wiki/Cake_tin_conversion_charts
One full recipe should make enough for one 10″ pan as long as it is at least 2″ tall, ideally 3″. Then you can bake another batch for the second layer.
Natalie B says
I used this as the base for Fruity Pebbles cake for a friend’s party. I soaked a coup and a half of cereal in the milk for about 30 minutes, drained and added the ‘cereal milk’ to the mix as instructed, along with lemon extract and orange zest (only fruity flavors I had on hand). At the end, I stirred in the soggy cereal plus a cup of dry. I was a little nervous that the cake would be dry because of the small amount of oil, but it is by far the moistest cake I have ever made. This is definitely going into my collection for future use!
Olivia says
Hi Natalie! Thanks for your tips and feedback. I’m glad you loved it!
Kestley says
Hey! If I made this cake and put it in the freezer then decorated it like two days later will it still be okay?
Olivia says
Hi Kestley! Yes, that’s totally fine.
AllyBee says
Love, love, LOVE this recipe. This was my third time making this. I made it exactly as written the first time, and the only thing I’ve made a change to in the other times is the sugar content. HALF the amount of sugar is much better if you’re topping the cake with anything sweet, like frosting or whip. This cake has a bigger crumb, think cornbread texture. It’s moist, but a different texture than other cakes I’ve tried. It is absolutely PERFECT for tres leches! Also this time, I didn’t have time to bring my ingredients all the way up to room temp, but the cakes still turned out totally fine, so don’t sweat it if you forget to set out your ingredients! (I used a Duncan Hines yellow cake mix)
Andrea says
Could I use an extra egg for moisture? I’m looking for something dense to stack (like this says it will turn out) but also fluffy and moist. Also, would it be better to beat eggs whites to a peak and incorporate to add fluffiness?
Olivia says
Hi Andrea! For best results follow the recipe as written.
Christina says
I use this method exclusively and have always had great results. I’m going to be making a gluten free cake, do you think this method will work with a King Arthur Gluten free box mix? I’d be using King Arthur Gluten free flour.
Olivia says
Hi Christina! Yes I think that should work fine. Let me know how it turns out!
Jen says
Can’t wait to try this! I was wondering if you’ve had to make any adjustments since the cake boxes are now smaller? For instance, the Betty Crocker Super Moist French Vanilla now is only 13.25 oz.
Olivia says
Hi Jen! It should work fine with the adjusted cake mix sizes.
Mia towne says
Cake made and tasted…very dry! Only 2 tablespoons of oil is not enough for a cake.. very disappointed
Olivia says
Hi Mia! It should not have tasted dry — the sour cream and milk add a lot of moisture to it. Is it possible it was overbaked?
Dee Eberly says
Can I add smashed bananas to a white boxed cake
Olivia says
Hi Dee! I haven’t tried this myself and it might require some experimentation to get it right.
Nan says
How long would you bake mini cupcakes with this recipe.
Thank You
Olivia says
Hi Nan! I haven’t made this as minis myself but I would check them at about 7-8mins.
Keesha Simmons says
I love your recipe, however I have a question can I put this cake in the refrigerator after crumbcoat?
Olivia says
Hi Keesha! For sure, that will be fine.