Easy Peanut Butter Bars

INGREDIENTS

• cooking spray
• 1 3/4 cups all-purpose flour
• 1 1/4 cups packed light brown sugar
• 3/4 cup peanut butter
• 1/2 cup butter, softened
• 3 tablespoons milk
• 1 egg
• 1 tablespoon vanilla extract
• 3/4 teaspoon salt
• 3/4 teaspoon baking soda
• 1 (6 ounce) package chocolate chips (optional)