Per serving
These marshmallow monster cookies are just like the classic with a big marshmallow stuffed inside each cookie. Gooey and delicious!
Preheat the oven to 350 degrees F. Line a baking sheeta with parchment paper. Combine the flour, baking powder and baking soda in a large bowl. In a separate bowl, beat the butter and both sugars with a mixer on medium-high speed until fluffy. Beat in the eggs one at a time on medium speed, then beat in the vanilla. Add peanut butter and mix until smooth. Add the flour mixture and beat on low speed until combined.
Stir the oats, chips, and marshmallows into the dough with a wooden spoon. Drop heaping tablespoonfuls of the dough onto the prepared baking sheets, about 3 inches apart. Bake the cookies in batches until golden, 8-10 minutes.
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