Peanut Butter Chocolate Chip Muffins

2 1/4 c. all-purpose flour
2 tsp. baking powder
1/2 tsp. salt
2/3 c. brown sugar
6 tbsp. butter, melted and cooled
1/2 c. peanut butter
2 lg. eggs
1 c. milk
3/4 c. chocolate chips

Preheat oven to 375°F. Line a muffin pan with 12 paper liners.

In a medium bowl, whisk together flour, baking powder, salt, and brown sugar. Set aside.

In a large bowl, whisk together melted butter, peanut butter, eggs, and milk until smooth. Add in flour mixture and stir until just combined. Stir in chocolate chips. Divide batter evenly between prepared muffin tins, filling each to the top.

Bake for 17 to 20 minutes or unitl toothpick inserted in center comes out clean. Allow to cool for 5 minutes in pan, then remove to wire rack to cool completely.