Monster Cookie Pancakes

Ingredients

• 1 cup all-purpose flour
• 1/2 cup quick-cooking oats
• 3 tablespoons brown sugar
• 1 teaspoon baking powder
• 1/2 teaspoon baking soda
• 1/2 teaspoon sea salt
• 1/8 teaspoon ground cinnamon, or to taste
• 1/2 cup peanut butter
• 1/4 cup butter
• 1 1/3 cups buttermilk
• 1 large egg
• 1/3 cup chocolate chips
• 1/4 cup peanut butter
• 1/4 cup confectioners sugar, or more to taste
• 1/8 teaspoon sea salt
• cooking spray
• 1/3 cup candy-coated milk chocolate pieces (such as M&M's®)