8 TBSP butter, cut into chunks
3 ounces unsweetened chocolate, chopped
1 cup sugar
2 large eggs
1 tsp vanilla extract
1/2 tsp baking powder
1/4 tsp salt
2/3 cup all-purpose flour
1/3 cup creamy peanut butter
2 TBSP brown sugar
Heat oven to 350 degrees. Melt the butter and chocolate together in the microwave, stirring often, 1 to 3 minutes. Let mixture cool slightly.
Whisk the sugar, eggs, vanilla, baking powder and salt together in a large bowl until combined. Whisk in the melted chocolate mixture until smooth. Stir in flour until no streaks remain.
Scrape the batter into a prepared 8-inch square pan. Mix peanut butter and brown sugar together. Drop about 10 dollops over the batter. Using a butter knife swirl the peanut butter around the batter some.
Bake about 22 to 27 minutes.
(This recipe easily doubles to 9x13 pan. I like to melt the butter and chocolate seperate too.)