Instructions

To make the cakes:

1. Preheat oven to 350°F. Grease and flour 12 1-cup individual Bundt tins.
2. Whisk together the flour, baking powder, baking soda, and salt. Set aside.
3. Using an electric mixer on medium speed, beat the butter and sugar until light and fluffy. Add the eggs, one at a time, mixing well after each addition. Mix in the chocolate and vanilla.
4. Reduce mixer speed to low. Add the flour in 3 portions, alternating with 2 portions of milk. Mix just until combined.
5. Fill each prepared Bundt tin 1/2 full. Scatter some peanut butter chips around the center of the batter. Pour the remaining batter over the peanut butter chips.
6. Bake 18-20 minutes, or until a pick inserted into the center comes out clean.. Cool in the pan for 5 minutes. Then, remove the cakes from the pan and cool completely on a wire rack.

To make the glaze:

1. Combine the cocoa powder, confectioners' sugar, and milk. Mix until smooth. Spoon over each Bundt cake.
2. Allow the glaze to set before serving.