Gather your ingredients.
Chop the 3 Musketeers® Hot Cocoa with Marshmallow Minis (34) into smaller pieces. I chopped mine into 6 pieces for each bar.
In a medium saucepan over low heat, combine the Sweetened Condensed Milk (14 ounce), Milk Chocolate Chips (11 ounce), and half of the chopped 3 Musketeers bars. Heat and stir until all chocolate is completely melted and the mixture is almost smooth.
Remove from heat, and stir in the Vanilla Extract (1/2 teaspoon), and Kraft® Jet-Puffed Mallow Bits, Vanilla (1/2 cup).
Add the other half of the chopped 3 Musketeers bars, and stir until completely combined.
Then spread the mixture evenly onto a parchment paper lined 8″ x 8″ pan or glass dish. Sprinkle the top with Kraft® Jet-Puffed Mallow Bits, Vanilla (1 tablespoon).
Place the container in the fridge and chill until set, about 2 hours. Cut, serve and enjoy!