Peanut Butter Swirled Brownies

Directions

1. 1
   To make the brownies:Pre-heat the oven to 350 degrees. Butter a 9x13 baking dish.In small saucepan over low heat, melt butter completely. Stir in sugar and continue cooking for 1-2 minutes, stirring constantly. Do not allow sugar mixture to boil.
2. 2
   Pour butter mixture into a large bowl or stand mixer, beat in cocoa powder, eggs, salt, baking powder, espresso powder, and vanilla extract.
3. 3
   Mix until well combined.Stir in the flour until well combined.
4. 4
   Spread the batter into prepared pan (it will be very thick and sticky).To make the peanut butter swirl:Stir together all of the ingredients in a small bowl until well combined.Drop large spoonfuls of the filling over the brownie batter.Use a butter knife to swirl the mixture into the brownie batter.
5. 5
   Bake for 30-35 minutes or until a tester comes out mostly clean.Cool completely.