Easy M&M Cookie Bars (Print Version)

# Ingredients:

→ Dry Ingredients

01 - 2 and 3/4 cups (343g) all-purpose flour, spooned and leveled
02 - 1 and 1/2 teaspoons cornstarch
03 - 1 teaspoon baking soda
04 - 1/2 teaspoon salt

→ Wet Ingredients

05 - 1 cup (226g) unsalted butter, melted and slightly cooled
06 - 1 cup (200g) packed light or dark brown sugar
07 - 1/2 cup (100g) granulated sugar
08 - 2 large eggs, at room temperature
09 - 2 teaspoons pure vanilla extract

→ Mix-Ins

10 - 1 and 1/4 cups (260g) mini or regular-size M&Ms
11 - 3/4 cup (135g) semi-sweet chocolate chips

# Instructions:

01 - Preheat oven to 350°F (177°C). Line a 9x13-inch baking pan with parchment paper, leaving overhang on sides. Place rack in center position.
02 - Whisk together flour, cornstarch, baking soda, and salt in a large bowl.
03 - In a medium bowl, whisk melted butter and sugars until no lumps remain. Whisk in eggs and vanilla extract.
04 - Pour wet ingredients into dry ingredients and mix with spoon or spatula. Fold in M&Ms and chocolate chips. Dough will be soft and thick.
05 - Press dough into prepared pan. Bake 26-30 minutes until lightly browned and toothpick comes out mostly clean. Tent with foil if browning too quickly.
06 - Cool in pan on wire rack for at least one hour. Optionally press additional M&Ms into warm top. Once cool, lift out using parchment and cut into squares.

# Notes:

01 - Can be made ahead and frozen for up to 3 months
02 - Dough can be chilled for up to 3 days
03 - Cornstarch can be omitted if needed
04 - Stores at room temperature for up to 1 week