Buttermilk-Chocolate Cake

1 . Stage

Preheat the oven to 350 degrees F (175 degrees C). Grease a fluted tube pan (such as Bundt®).

2 . Stage

Bring 1/2 cup milk to a boil over medium heat. Remove from the heat and add bittersweet chocolate. Let stand for 5 minutes. Stir until smooth, then let cool for 30 minutes.

3 . Stage

Stir all-purpose flour, whole wheat flour, baking powder, baking soda, and salt together in a medium bowl.

4 . Stage

Beat sugar and margarine in a large bowl with an electric mixer until fluffy. Add eggs, 1 at a time, beating briefly after each addition. Mix in Irish cream liqueur and cooled chocolate mixture. Add flour mixture in 3 batches, alternating with buttermilk, stirring batter briefly after each addition. Pour batter into the prepared pan.

5 . Stage

Bake in the preheated oven until top springs back when lightly touched, 50 to 55 minutes. Cool on a wire rack for 10 minutes. Tap the pan a few times and shake it gently to loosen cake. Invert carefully onto a serving plate and let cool completely, about 20 minutes.

6 . Stage

Meanwhile, heat milk and oil for ganache in a saucepan over medium heat until boiling. Remove from the heat and add milk chocolate. Let stand for 5 minutes. Stir until smooth, then let cool for 15 minutes. Spread onto cooled cake.