Ingredients
1.5 sticks unsalted butter
.5 cup chunky peanut butter
4 oz unsweetened chocolate
2 cups packed light brown sugar
1 tsp vanilla extract
4 large eggs
1 cup all-purpose flour
.5 tsp salt
1.5 cups coarsely chopped peanut brittle
Preparation
Preheat oven to 350 degrees with rack in the middle. Butter and flour a 13x9 inch baking pan.
Melt butter, peanut butter and chocolate in a 3 qt heavy saucepan over low heat, stirring, until smooth. Remove from heat and cool. Whisk in brown sugar and vanilla. Whisk in eggs 1 at a time.
Whisk together flour and salt, then whisk into chocolate mixture.
Spread in pan. Bake 25 minutes. Sprinkle with brittle. Bake until pick inserted in center comes out with crumbs, about 5 minutes. Cool completely.
