Monster Cookie Bars are the ultimate crowd-pleasing dessert, packed with everything you love in one chewy, colorful bite. These bars combine rich peanut butter flavor, hearty oats, melty chocolate chips, and crunchy candy-coated chocolates, all baked into thick, soft bars that are perfect for sharing. With their golden edges, soft centers, and pops of color on top, they’re just as fun to look at as they are to eat.
Easy to make and ideal for parties, bake sales, or casual treats at home, these cookie bars come together quickly in one bowl and bake up beautifully in a single pan. Whether you enjoy them slightly warm and gooey or fully cooled and chewy, Monster Cookie Bars are a reliable favorite that never disappoints.
Ingredients
- ½ cup unsalted butter, softened
- 1 cup brown sugar, packed
- ½ cup granulated sugar
- 1 cup creamy peanut butter
- 2 large eggs
- 1 teaspoon vanilla extract
- 1 teaspoon baking soda
- ½ teaspoon salt
- 2 cups old-fashioned oats
- 1½ cups all-purpose flour
- 1 cup semi-sweet chocolate chips
- 1 cup candy-coated chocolates (such as M&M’s), plus extra for topping
