These sheet pan cookies are soft, chewy and customizable! It's one dough and four flavors baked in one pan for the best 4-in-one cookie bars for a crowd.
Preheat and prepare: Preheat the oven to 350°F. Line a 15x10" pan with parchment paper. Leave an over hang for easy removal. Then spray with non-stick spray.
Cream wet ingredients: In a large bowl using a mixer, cream together 1 cup butter, 1 cup brown sugar, and 3/4 cup granulated sugar for 1 minute. Add 2 eggs and 2 teaspoons vanilla and mix until combined.
Add dry ingredients: Add 3 cups flour, 1 teaspoon baking soda and 3/4 teaspoon salt and stir mixture just until combined.
Divide dough and add mix-in's: Divide the dough into 4 equal sections and place in 4 medium bowls. Add 1/2 cup M&M's to one bowl, 1/4 cup sprinkles to one, 1/4 cup white chocolate chips and 1/4 cup dried cranberries to one, and 1/4 cup peppermint bark with 1/4 cup chocolate chips to the last bowl.
Spread onto pan: Place each cookie dough portion in 1 quadrant of the sheet pan. Flatten the dough using a spatula.
Bake and cool: Bake for 13-15 minutes, or until the top is barely golden brown. Place extra mix-ins on the top, if desired. Allow to cool completely. When cutting, cut each quadrant first, in a big T shape. Then cut each section into 6 pieces.
Notes
M&M's: Feel free to use regular M&M's or colored M&M's based on which holiday you are making them for. Sheet pan chocolate chip cookies: Don't divide the dough, stir in 2 cups of chocolate chips (semi-sweet, milk or dark). Storage:Once cooled store in an airtight container for up to 3 days. Freeze up to 3 months. Remove an hour before serving to thaw. Can warm in the microwave for 10 to 15 seconds.