https://www.allrecipes.com/recipe/10444/peanut-butter-cup-brownies https://www.tasteofhome.com/recipes/peanut-butter-brownie-mix https://www.allrecipes.com/recipe/11504/chewy-peanut-butter-brownies www.thehungryhousewife.com/2012/05/peanut-butter-swirl-brownies.html (You can use a box of brownie mix to make it … These Peanut Butter Cup Brownies are packed with milk chocolate peanut butter cups mixed in our rich and chewy homemade brownie mix.