Vanilla Sour Cream Bundt Cake from Boxed Mix

Doctored cake mix bundt cake made with sour cream and instant vanilla pudding. This easy dessert always gets compliments because it tastes homemade. It’s one of the simplest and most reliable ways to upgrade a boxed cake mix.

Easy Cake Mix Bundt Cake with Pudding and Sour Cream

This recipe is ideal if you don’t consider yourself a baker. It’s semi-homemade: you get the flavor and texture of a homemade cake with minimal effort. I’ve made this many times and people never guess it started from a box. It’s one of my favorite ways to improve boxed cake mix.

You don’t need a mixer or whisk—just a large spoon and one bowl. Mix everything by hand, pour into a bundt pan, and bake. Experienced bakers may be skeptical, but the results are consistently impressive: soft, moist, and flavorful.

Ingredients You’ll Need

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

These additions transform a boxed cake into something that tastes homemade. I used Betty Crocker, but Pillsbury, Duncan Hines, or any similar mix will work. You can also experiment with different cake and pudding flavors for variations.

What happens when you add sour cream to cake mix?

Adding the right amount of sour cream makes the cake richer, more flavorful, and pleasantly denser. Too little won’t make much difference; too much can weigh the cake down. This recipe balances moisture and tenderness.

What happens when you add pudding to cake mix?

Instant pudding mix enhances flavor, adds moisture, and helps produce a softer, fluffier crumb.

How to Make Sour Cream Bundt Cake from Cake Mix

Preheat the oven to 325°F. Baking at 325°F produces a softer, moister cake with a golden, not overly dark, crust. I’ve had better results at 325°F than at 350°F.

Grease the bundt pan well with oil or butter. Use your fingers or a pastry brush to coat the entire interior, including the tube and any crevices.

Mix the ingredients. In a large bowl, combine the sour cream, oil, and milk. Beat in the eggs, then fold in the cake mix and pudding mix until just combined. The batter will be thick—that’s normal.

Pour the batter into the prepared pan and bake 40–45 minutes. Test by inserting a toothpick deeply into the center; it should come out clean.

Cool the cake in the pan for about 20 minutes before removing. Waiting helps prevent the cake from breaking apart. To remove, place a large plate over the pan and flip it right side up. If it doesn’t release immediately, tap the pan gently until it does.

After it cools, top with a glaze or frosting of your choice. The cake isn’t overly sweet, so you can use a thick frosting or a simple glaze made from powdered sugar, milk, and vanilla. Decorate with sprinkles if desired.

This bundt cake bakes up soft, moist, fluffy, and flavorful. Serve at room temperature or chilled—both are delicious. The flavor often improves a bit after resting.

If you try this recipe, share how it turned out in the comments.

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