Line a 9X14 casserole dish with parchment paper. Melt 1 1/2 cup of the dark chocolate and whisk in 1/4 cup almond milk and 1 tablespoon coconut oil. Pour into bottom of prepared dish. Refrigerate for 1 hour.
Meanwhile, melt the white chocolate. Whisk in remaining almond milk, coconut oil, and peppermint oil until well combined. Pour over first chocolate layer and spread evenly. Refrigerate for 1 hour.
Melt the remaining dark chocolate. Pour over white chocolate fudge layer. Allow to set. Cut into squares and enjoy!