Step 1

Preheat oven to 325 degrees. Spray a 10-inch Bundt pan with baking spray with flour.

Step 2

In a large mixing bowl, use an electric mixer to cream the butter, peanut butter, granulated sugar and brown sugar until light and creamy, about 5 to 7 minutes.

Step 3

Add eggs, beating well after adding each one, and stopping to scrape down the sides of the bowl several times.

Step 4

Beat in vanilla.

Step 5

In a medium bowl, whisk together flour, salt, baking powder, and baking soda.Add flour mixture to the batter, alternating with milk and beating just until incorporated.

Step 6

Fold in the mini chocolate chips and transfer batter to the prepared bundt pan.Bake for 60 to 70 minutes or until a toothpick inserted in the center comes out clean.Let cool in pan for 10 minutes and then invert onto a serving platter.

Step 7

To make icing, use an electric mixer to beat butter and peanut butter until smooth. Add confectioners' sugar and 1 tablespoon of milk and beat until smooth.Add more milk until it is thin enough to spread.

Step 8

Spread frosting on cake.