Begin by breaking the Oreos into large chunks in a mixing bowl. Set aside these crunchy bits.

In a microwave-safe bowl, combine the white chocolate morsels. Heat in the microwave for 30 seconds at a time until fully melted and smooth.

Stir in the mint extract and a few drops of green food coloring into the melted chocolate.

Gently fold the broken Oreos into the warm chocolate mixture until fully coated.

Line a baking sheet with parchment paper, pour the mixture, and spread it evenly to about 1/2-inch thick.

Freeze the baking sheet for about 2 hours, or until the bark is firm.

Remove from the freezer, peel off wax paper, and break into pieces of desired size.