Line a baking sheet with parchment paper or a silicone baking mat. Set aside.
In a medium microwave safe bowl, melt the chocolate in 30 second increments stirring between each to avoid seizing. Add the oil and mix well. Stir in red velvet cake mix and red food coloring until smooth.
Pour chocolate mixture onto prepared baking sheet and spread out into a large rectangle. Sprinkle generously with crushed Oreo cookies.
Place bark in a cool dry place at room temperature to set. Once hardened, break into pieces.
Store in an air tight container up to 3 weeks.