Chewy peanut butter oatmeal cookie bars loaded with M&M’s and chocolate chips—your go-to easy dessert for any holiday.

Scale

2 cups all-purpose flour

2 cups old fashioned oats

1 teaspoon baking soda

1 teaspoon sea salt

1 cup unsalted butter, room temperature

1 cup creamy peanut butter

1 1/2 cups light brown sugar

1/2 cup granulated sugar

2 large eggs

1 tablespoon vanilla extract

1 1/4 cups semi-sweet chocolate chips

1 1/2 cups M&M’s, divided

Flaky sea salt for topping

1. Preheat oven to 350°F and grease a 9×13-inch pan.

2. Whisk flour, oats, baking soda, and salt together.

3. Cream butter, peanut butter, and sugars until smooth. Add eggs and vanilla.

4. Mix in dry ingredients until just combined.

5. Stir in chocolate chips and 1 cup of M&M’s.

6. Spread into pan, top with remaining M&M’s.

7. Bake 25–35 minutes until golden. Sprinkle with sea salt and cool before cutting.

Store at room temperature for 5 days or freeze for up to 3 months.

Keywords: cookie bars, monster cookies, M&M dessert bars, peanut butter oatmeal