French Chocolate Sour Cream Cake with Whipped Chocolate Frosting

French Chocolate Cake
This French Chocolate Cake is known for its exceptionally moist and velvety texture, achieved through the use of boiling water and a blend of cocoa and shortening. It offers a rich chocolate flavor with a tender crumb, perfect for celebrations or indulgent treats. Paired with a luxurious whipped chocolate frosting, this cake is both nostalgic and decadent, a classic mid-century recipe that's stood the test of time.
Prep Time 25 minutes
Cook Time 50 minutes
Cooling Time 1 hour
Total Time 2 hours 15 minutes
Course Dessert
Cuisine French
Servings 12
Calories 425 kcal

Ingredients
  

For the Cake:

  • ½ cup cocoa (instant)
  • ¾ cup boiling water
  • 1 cup sour cream
  • ½ tsp baking soda
  • ½ cup butter
  • 2 cups sugar
  • 3 eggs (room temperature)
  • 2 cups cake flour (sifted)
  • 1 tsp vanilla extract

For the Whipped Chocolate Frosting:

  • 6 tbsp butter
  • 2 oz unsweetened chocolate
  • 2 cups powdered sugar
  • ½ tsp salt
  • ¼ – ⅓ cup milk
  • 1 whole egg
  • 1 tsp vanilla extract

Instructions
 

Step 1: Prepare Cocoa Mixture

  • Combine cocoa with boiling water in a bowl. Stir until smooth.
  • Cool slightly, then mix in sour cream and baking soda.

Step 2: Cream Butter and Sugar

  • In a large bowl, cream butter and sugar until light and fluffy.

Step 3: Add Eggs

  • Beat in eggs, one at a time, until fully incorporated.

Step 4: Combine Wet and Dry Ingredients

  • Sift together cake flour and salt.
  • Add dry ingredients to the creamed mixture alternately with the cocoa-sour cream mixture.
  • Stir in vanilla.

Step 5: Bake the Cake

  • Pour batter into greased and floured 8″ x 13″ pan or two 9″ pans.
  • Bake at 300°F for 50 minutes or until a toothpick inserted comes out clean.
  • Do not remove from pan immediately. Let cool completely before frosting.

Step 6: Make Whipped Chocolate Frosting

  • Melt butter and chocolate over low heat. Cool.
  • Beat in powdered sugar, salt, milk, egg, and vanilla.
  • Place bowl over warm water and beat until mixture is fluffy and slightly thickened.
  • Cool completely before spreading on cake.

Tips

  • Do not remove the cake from the pan before frosting, as noted on the card
  • Chill frosting slightly if it becomes too soft while spreading
  • Use Dutch-process cocoa for a deeper chocolate flavor
  • Frost only after cake has completely cooled
  • Spread frosting between two layers for a more dramatic presentation
  • Lightly grease and flour pans to prevent sticking
  • Beat frosting until color lightens, as described, for correct texture
  • Serve with whipped cream or fresh berries if desired

Nutrition

Calories: 425kcalCarbohydrates: 51gProtein: 4gFat: 24gSaturated Fat: 11gTrans Fat: 1.2gCholesterol: 55mgSodium: 210mgPotassium: 160mgFiber: 2gSugar: 37gVitamin A: 320IUCalcium: 28mgIron: 2.5mg
Keyword chocolate dessert, heirloom recipe, holiday dessert, homemade frosting, layered cake, sour cream cake, vintage cake
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