Super Peanut Butter Filled Brownies

My most-requested dessert recipe. Moist brownie bottom topped with a thick peanut butter filling and topped off with a chocolate glaze. Please watch the brownies carefully and remove from the oven when toothpick comes out with moist crumbs clinging to it. If your toothpick comes out completely clean then they are overbaked and you will end up with a "cake-like" brownie. Glass pyrex baking pans have yielded the best results in my experience. Note: This recipe doubles beautifully!