Monster Skillet Cookie

Bahan-bahan (12 porsi)

• 1 cup creamy peanut butter
• ½ cup (1 stick) unsalted butter, (at room temperature)
• 1 cup lightly packed light brown sugar
• ½ cup granulated white sugar
• 2 large eggs
• 1 large egg yolk
• 1½ teaspoons vanilla extract
• 1½ cups old fashioned rolled oats
• 1 cup all purpose flour
• ½ teaspoon baking soda
• ½ teaspoon salt
• ½ cup semi-sweet chocolate chips
• ½ cup M&M's candy