Line a loaf pan with parchment paper. Set aside.

In a microwave-safe bowl, combine semi-sweet chocolate chips with 3 Tablespoons sweetened condensed milk.

Heat in microwave for 25 seconds, stir well, and reheat for another 25 seconds as needed until you get a smooth consistent texture.

In a second microwave-safe bowl, combine white chocolate chips with 3 Tablespoons sweetened condensed milk and repeat the same heating procedure as for the semi-sweet chocolate chips.

Stir the white chocolate mixture until completely smooth, then add in the mint extract and green food dye as desired.

Drop tablespoon-sized spoonfuls of each chocolate mixture into the loaf pan, trying to place mint fudge alongside chocolate fudge.

Once all fudge has been added to the loaf pan, smooth with an offset spatula.

Refrigerate at least 4 hours (or overnight) to set.

When ready, remove pan from fridge and remove the fudge from the pan, then the parchment paper.

Cut into inch squares for bite-sized servings.