This Bonnie Butter Cake recipe delivers a rich, tender cake that is soft, moist, and buttery in every slice. The chocolate frosting adds a creamy, slightly sweet layer that complements the golden cake beautifully.Baking it fills the kitchen with a warm, inviting scent that tempts anyone nearby. Serving it slightly warm enhances the melt-in-your-mouth texture, while cooling allows the frosting to set into a silky finish.
240 gall‑purpose flouror 220 g cake flour for a lighter texture
225 gunsalted buttersoftened
200 ggranulated sugar
4large eggs
120 mlwhole milk
1 tsppure vanilla extract
2 tspbaking powder
¼ tspsalt
For the Frosting (French Silk / Fudge Style)
200 gdark chocolate70 % cocoa recommended
175 gunsalted buttersoftened
150 gpowdered sugar
2large eggsor 60 ml pasteurized egg substitute
1 tspvanilla extract
Instructions
Step 1: Get Ready
Preheat the oven to 350°F (175°C). Grease two 9-inch round pans and dust them lightly with flour to prevent sticking.
Step 2: Make the Cake Base
In a large bowl, use an electric mixer to beat the softened butter with the sugar until the mixture is light and fluffy. Add the eggs one at a time, mixing well after each addition. Stir in the vanilla extract.
Step 3: Combine Dry and Wet Ingredients
In a separate bowl, whisk together the flour, baking powder, and salt. Gradually add the dry mixture to the butter mixture, alternating with the milk. Start and finish with the dry ingredients. Mix gently on low speed, just until everything is combined don’t over mix.
Step 4: Bake the Cake
Pour the batter into the prepared pan(s). Bake for 45–50 minutes if using a rectangular pan, or 30–35 minutes for round layers. Test with a toothpick in the center; it should come out clean. Once done, transfer the cake to a wire rack and let it cool completely.
Step 5: Make the Frosting
Chop the dark chocolate and melt it gently in a heatproof bowl over simmering water, or melt it carefully in the microwave in short bursts. Let it cool slightly. In another bowl, beat the softened butter with powdered sugar until creamy. Add the eggs (or an alternative) and vanilla, then slowly mix in the melted chocolate until smooth and glossy.
Step 6: Frost and Enjoy
When the cake is fully cooled, spread the chocolate frosting evenly on top, or between layers if using round cakes. Slice and serve.
Notes
Notes: Use room temperature butter and eggs for a smoother batter. Make sure the cake is completely cooled before frosting to prevent melting. Frosting contains raw eggs; use pasteurized eggs for safety if preferred.