Spray a 12 cup square or standard muffin pan with baking spray
Place peanut butter and butter in a bowl and mix until no flecks of butter remain (2 min)
Add sugar and mix until thoroughly combined (5 min)
Add eggs and vanilla.
Mix in flour, baking powder, and salt until thoroughly combined. Batter will have a silky texture.
Divide batter evenly in the 12 cup square muffin pan. (I used a size 16 scoop)
Place pan on the middle rack.
Bake for 25 minutes or until the top of the cake are golden brown. If testing with a toothpick, it should come out clean.
Let cakes cool in pan for 5 minutes then remove to rack.
Glaze completely cooled cakes and sprinkle with mini chocolate chips.
Notes
To make the glaze: Combine the powdered sugar, peanut butter, milk and vanilla extract in a small bowl. Whisk until you have a smooth consistency. Dip cakes in the glaze and let the extra run off. Sprinkle cakes with mini chocolate chips before the glaze sets.
Recipe by I bake he shoots at http://ibakeheshoots.com/mini-peanut-butter-pound-cake/