Line an 8-inch square pan with parchment paper, leaving a little overhang for easy removal.
Melt the dark chocolate wafers according to the package directions. Pour the melted chocolate into the prepared pan and smooth it into an even layer.
While the chocolate is still warm, sprinkle the ½ cup of peanut M&Ms and the crushed waffle cone pieces evenly over the top. Gently press them into the chocolate so they set in place.
Drizzle the marshmallow fluff over the chocolate layer. If it’s too thick to drizzle, microwave it for a few seconds to loosen it up. Let the pan sit at room temperature for about 5 to 10 minutes so the base can slightly set.
Melt the white chocolate wafers and stir in pink food coloring until you reach your desired shade. Pour the pink chocolate over the first layer and spread it out gently.
Finish with Valentine’s sprinkles and the remaining ¼ cup of peanut M&Ms on top. Transfer the pan to the fridge and chill for about 15 minutes, or until fully set.
Lift the bark out using the parchment, let it come to room temperature, and slice into thick, chunky bars.