Easy Christmas Tree Cookie Bars

Heat oven to 350°F. Line 13x9-inch pan with foil, leaving foil overhanging at 2 opposite sides of pan; spray with cooking spray.

In large bowl, mix cookie mix, softened butter, cream cheese and egg with spoon until soft dough forms. Spread dough in bottom of pan. Bake 20 to 23 minutes or until golden brown. Cool completely on cooling rack, about 1 hour.

Remove bars from pan by lifting foil; peel foil away. Cut into 27 triangles as follows: Cut 3 horizontal rows. Cut each row into 9 triangles so each triangle has a 2-inch wide base. (See link to diagram below.) Set aside end pieces for snacking.

Break pretzel sticks in half. Insert pretzel half in short end of each triangle. In small bowl, tint frosting with green food color to desired color. Spoon frosting into small resealable food-storage plastic bag; partially seal bag. Cut off tiny corner of bag. Squeeze bag to pipe frosting over bars. Sprinkle with sprinkles. Place 1 chocolate candy on top of each triangle. Store in airtight container at room temperature.