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Close up of the inside of the moist chocolate cake.
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5 from 4 reviews

Moist Chocolate Cake

This moist chocolate cake is inspired by Matilda's chocolate cake. It is a super moist and fudgy chocolate cake filled with silky chocolate frosting.
Prep Time45 minutes
Cook Time23 minutes
Decorating Time30 minutes
Total Time1 hour 38 minutes
Servings: 16 slices
Calories: 642kcal

Ingredients

Chocolate Cake

  • 2 cups All-purpose flour
  • 1/4 cup Cornstarch
  • 1 cup Unsweetened cocoa powder
  • 2 tsp Baking powder
  • 1 tsp Baking soda
  • 1 tsp Salt
  • 1 cup Oil canola or vegetable oil
  • 1 cup White granulated sugar
  • 3/4 cup Brown sugar packed light or dark
  • 4 Large eggs room temperature
  • 1 tsp Pure vanilla extract
  • 1 tsp White vinegar
  • 1 cup Buttermilk room temperature
  • 1/2 cup Sour cream or greek yogurt. room temperature
  • 1 cup Hot water

Chocolate Frosting

  • 2 cups Unsalted butter room temperature
  • 1 1/2 cups Powdered sugar sifted
  • 3/4 cup Unsweetened cocoa powder sifted
  • 3 TBSP Light corn syrup
  • 1 tsp Pure vanilla extract
  • 1/4 tsp Salt
  • 2 cups Semi-sweet chocolate chips melted

Instructions

Chocolate Cake

  • Preheat the oven to 350℉. Line three 8-inch cake pan with baking nonstick spray. Line the bottoms with parchment paper circles. Spray again.
  • In a large bowl, sift the flour, cornstarch, cocoa powder, baking powder, baking soda, and salt.
    2 cups All-purpose flour, 1/4 cup Cornstarch, 1 cup Unsweetened cocoa powder, 2 tsp Baking powder, 1 tsp Baking soda, 1 tsp Salt
  • In a separate bowl, mix the oil, sugar, brown sugar, eggs, vanilla, vinegar, sour cream, and buttermilk. Use a whisk to mix it. Slowly whisk in the hot water.
    1 cup Oil, 1 cup White granulated sugar, 3/4 cup Brown sugar, 4 Large eggs, 1 tsp Pure vanilla extract, 1 tsp White vinegar, 1 cup Buttermilk, 1 cup Hot water, 1/2 cup Sour cream
  • Pour the wet ingredients into the dry ingredients. Whisk until smooth and no flour lumps.
  • Pour the cake batter evenly into the three cake pans. Bake for 22-25 minutes. Bake until a toothpick inserted comes out clean.
  • Let the cakes sit in the hot pans for 10 minutes before transferring to cooling racks. Cool completely before decorating.

Chocolate Frosting

  • In a medium bowl, sift the powdered sugar and cocoa powder together. In a small bowl, add the chocolate chips and heat in the microwave for 20 second intervals. Mix well in between. Heat and mix until melted.
    1 1/2 cups Powdered sugar, 3/4 cup Unsweetened cocoa powder, 2 cups Semi-sweet chocolate chips
  • Using a mixer, beat the butter on high speed for 2 minutes. Scrape the bowl using a rubber spatula. Beat for another minute.
    2 cups Unsalted butter
  • Add in half of the powdered sugar on low speed until combined. Add the rest of the powdered sugar and mix.
  • Add in the corn syrup, vanilla, salt, and melted chocolate chips. Mix on high speed until smooth.
    3 TBSP Light corn syrup, 1 tsp Pure vanilla extract, 1/4 tsp Salt

Assembly

  • Place the first cake layer down. Spread 3/4ths cup of frosting over the cake. Top with the second cake layer and spread another 3/4ths cup of frosting.
  • Place the last layer of cake upside down (the bottom of the cake facing up). Spread a light layer of frosting over the cake. Freeze for 15 minutes to lock in the crumbs.
  • Frost the rest of the cake. I used all of the frosting. I used an offset icing spatula to create the swirls in the frosting.

Notes

Flour- Make sure flour is spooned and leveled or use a kitchen scale. Compacted flour can dry out the cake.
High altitude baking- Add an extra 2 TBSP of flour.
Pull out dairy ingredients 2 hours before baking.

Nutrition

Calories: 642kcal | Carbohydrates: 65g | Protein: 5g | Fat: 48g | Saturated Fat: 22g | Polyunsaturated Fat: 5g | Monounsaturated Fat: 18g | Trans Fat: 1g | Cholesterol: 76mg | Sodium: 330mg | Potassium: 310mg | Fiber: 5g | Sugar: 32g | Vitamin A: 761IU | Calcium: 90mg | Iron: 3mg