Toasted Marshmallow Peanut Butter Bars | The Fancy Pants Kitchen

Ingredients

• 1 & 2/3 (210g) cup all purpose flour
• 1 tbsp cornstarch
• 1/2 cup old fashioned rolled oats, lightly ground in a food processor
• 1/2 tsp baking soda
• 1/2 tsp salt
• 3/4 cup creamy peanut butter (like Jif or Skippy)
• 1/2 cup unsalted butter, room temp
• 1/2 cup light brown sugar, packed
• 1/4 cup granulated sugar
• 1 large egg
• 1 tsp vanilla extract
• 2 large egg whites
• 1/2 cup granulated sugar
• 1/4 tsp cream of tartar
• 1/2 tsp vanilla extract