Vanilla Pudding Sour Cream Bundt Cake (Box Mix)

Doctored boxed cake mix becomes a homemade-tasting bundt cake when you add sour cream and instant vanilla pudding. This simple hack transforms an ordinary cake mix into a moist, tender cake that gets compliments every time. It’s an ideal recipe for anyone who wants great results without spending hours in the kitchen.

Easy Cake Mix Bundt Cake with Sour Cream and Vanilla Pudding

If you don’t consider yourself a baker, this recipe is perfect: semi-homemade, quick, and forgiving. The extra ingredients—full-fat sour cream and instant pudding—give a boxed mix a richer flavor, more moisture, and a texture that feels homemade. I mix everything by hand in one bowl with a large spoon, so cleanup is minimal and no mixer is required.

While experienced bakers sometimes hesitate to use cake mix, this method consistently produces excellent results. You can use yellow or vanilla cake mix and swap pudding or cake-mix flavors for different variations.

Ingredients

• 1 cup full-fat sour cream
• 3/4 cup vegetable oil
• 1/2 cup milk
• 4 eggs
• 1 box (15–16 oz / 432–461 g) yellow or vanilla cake mix, unprepared
• 1 box (4-serving size) instant vanilla pudding mix, unprepared

These additions make a boxed cake taste like it came from scratch. You can use any major brand of cake mix and experiment with different pudding or cake flavors to change the cake’s character.

Why sour cream?

Adding the right amount of full-fat sour cream enriches the batter, producing a cake that is slightly denser, more tender, and more flavorful than a straight boxed mix. Too little won’t make a difference; too much can weigh the cake down, so follow the quantities listed.

Why pudding mix?

Instant pudding mix boosts moisture and structure while enhancing vanilla flavor. It helps the crumb stay soft and gives the finished cake a fluffier, finer texture.

How to make Vanilla Pudding Sour Cream Bundt Cake

1. Preheat the oven to 325°F. Baking at this lower temperature helps the cake stay moist and develop a golden, rather than dark, crust.
2. Prepare a 10–12 cup (9–10 inch) bundt pan by greasing it very well with oil or butter. Make sure the nooks, crevices, and center tube are fully coated.
3. Combine sour cream, oil, and milk in a large bowl.
4. Beat in the eggs until they are fully incorporated.
5. Add the cake mix and the instant pudding mix, and gently fold until everything is combined. The batter will be thick; that’s normal. Avoid overmixing.
6. Pour the batter into the prepared bundt pan and smooth the top.
7. Bake for 40–45 minutes, or until a toothpick inserted into the deep center comes out clean. If needed, test again from the opposite side to be sure.
8. Cool in the pan for about 20 minutes. Invert the pan onto a large plate and tap lightly if the cake doesn’t release immediately.
9. Let cool completely for about an hour (or until it’s no longer piping hot) before adding glaze or frosting.
10. Finish with a simple glaze made from powdered sugar, milk, and vanilla, or spread your favorite frosting. Decorate with sprinkles if desired.

This bundt cake turns out soft, moist, fluffy, and full of flavor. Serve it at room temperature or chilled—both are excellent options. The cake often tastes even better after it sits for a day as the flavors meld.

Recipe details

Notes and tips

• You can use golden or white cake mix in place of yellow or vanilla.
• Use full-fat sour cream for best texture and flavor. Low-fat may work but results will differ; nonfat is not recommended.
• Do not substitute butter for the oil—butter changes the texture and can make the cake heavier.
• If your cake mix already contains pudding, still add the extra instant pudding as listed; it improves moisture and structure.
• Store the cake in the refrigerator after 24 hours or keep refrigerated for up to 4–5 days.

If you try the recipe, leave a comment about how it turned out. Small tweaks—different cake or pudding flavors, or a flavored glaze—make this an adaptable, crowd-pleasing cake for many occasions.