Coat bottom of 15 x 10 x 1 inch baking pan with nonstick cooking spray;
line with wax paper and coat paper with nonstick cooking spray.
Mix cake batter according to package directions. Spread into prepared pan.
Bake at 350 degrees vF for 25 to 30 minutes or until center springs back
Cool in pan for 30 minutes; invert onto wax paper. Cool completely.
Mint Curls: While cake is baking and cooling, hold mint in palm of hand
for several seconds until slightly warm but still firm. Draw vegetable peeler
along edge of mint. Let curls fall onto wax paper. When mint breaks, set aside
for filling. Repeat with remaining mints. Chill curls.
To Make Filling: Chop broken mints to yield about 1/2 cup. Stir chopped
mints, extract and food coloring into can of frosting.
Glaze: In 4-cup glass, combine marshmallows, chocolate chips, and milk.
Microwave on HIGH for 1 minute; stir.
Chill in freezer until thickened before spreading, about 10 minutes.
To Assemble Cake: Using a ruler, cut baked cake into three equal pieces,
each about 5 x 10 inches. Place one piece on serving plate; spread with half
of cream cheese filling. Top with cake piece; spread with remaining filling.
Top with remaining cake piece.
Spread cooled glaze over top, allowing glaze to drip down sides of cake.
Gently shake mint curls from wax paper onto top of cake (curls may melt
if handled). Cut into 1-inch slices.
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