All the baking ingredients to make a 9x9 baking pan of Reese's Peanut Butter Brownies. Simply pour the mason jar mix into a bowl and add 3 eggs, 2/3 cup of vegetable oil, and 1 teaspoon of vanilla. Beat until combined, pour batter into a prepared 9x9 baking pan, and bake at 350 degrees for 20-30 minutes. Contains: salt, flour, cocoa, white sugar, golden yellow sugar, peanut butter chips, and semi-sweet chocolate chips. *Processed in the same facility as common allergens: wheat/gluten, peanuts, tree nuts, milk, soy and eggs. Cross contamination may occur. Jars by Jodi creates mason jar cookie and dessert mixes - perfect for party favours, presents, client gifting, or an easy way to make treats at home. Yield per mix: An 8x8 or 9x9 pan of brownies