Line an 8 -inch square pan -with foil,leave foil over hanging on both ends. Spray foil with food release
Place the morsels in a large bowl and microwave for approximately 1 minute, then stir. Microwave another 30 seconds until the mixture is very smooth.
Spoon in the can of frosting and vanilla extract mix well. Microwave for another 30 seconds if necessary continue to microwave 15 seconds at a time until the mixture is smooth.
Place 3/4 cup fudge mixture into 2 small bowls, leave remaining 1/3 untinted . Tint 1 bowl green and 1 bowl red-adding food coloring until the desired color.
Drop heaping tablespoons of green, red and white fudge mixture on the bottom of the baking dish, create a random pattern. Pull a butter knife or spatula through the layers of fudge to make a marbled effect. Refrigerate uncovered until set, approximately 1 hour.
Remove from pan by lifting foil ,peel foil away and cut in 8 rows or desired size.