Mississippi Mud Brownies Ingredients ¾ cups All-purpose Flour 2 Tablespoons Unsweetened Cocoa Powder ½ teaspoons Salt ½ cups Unsalted Butter, At Room Temperature 1 cup White Sugar ¾ teaspoons Pure Vanilla Extract 2 whole Large Eggs ¾ cups Semi-Sweet Chocolate Chips ½ cups Crunchy Peanut Butter 1-½ teaspoon Canola Oil 2 cups Mini Marshmallows