In a large sauce pan melt the butter. After the butter has melted, add your bag of marshmallows and constantly stir until the marshmallows have completely melted.
Pour in 2/3 of the marshmallow mixture in a large bowl. Add 4-6 drops of green food coloring and stir. Add in 2 cups of Rice Krispies, stir until mixed well.
Scoop out green rice krispies and create a ring around the outside of a round cake pan.
Next, add 4 drops of red food coloring to the remaining mixture left in the original bowl and stir. Add in the pink rice krispies to the pan and pat down until smooth.
Place desired amount of mini chocolate chips face down to resemble the seeds of a watermelon.
Pro Tip: After cutting your watermelons into slices, push a stick through the bottom and you’ll have Watermelon Rice Krispie Treat Popsicles!