Kue Monster Natal

Bahan-bahan (20 porsi)

• 2 sticks (1 cup) salted butter at room temperature
• 1 cup dark brown sugar
• 1/2 cup granulated sugar
• 2 large eggs, plus 1 egg yolk
• 1 tablespoon vanilla extract
• 2 cups all-purpose flour
• 2 teaspoons baking soda
• 2 teaspoons baking powder
• 1/2 teaspoon kosher salt
• 2 cups old fashioned oats
• 1 1/4 cups holiday M&M's
• 1 cup mini pretzel sticks, crushed
• 1 cup semi-sweet chocolate chips or chunks
• 1/2 cup white chocolate chips