1ST LAYER - BOTTOM GRAHAM CRACKER CRUST LAYER In a medium-large bowl, mix melted and cooled unsalted butter with finely ground, processed graham crackers. Press into the bottom of a 9 x 13 pan. Cover and chill until the next layer is ready.
2ND LAYER - CREAM CHEESE LAYER Using a hand held electric mixer, combine cream cheese, 1 cup sugar, 1-2 tablespoons apple cider vinegar or fresh squeezed lemon juice. Mixture should be even and smooth. Spread evenly on top of the graham cracker crust.
3RD LAYER - RED PUDDING PUDDING LAYER In a large mixing bowl, whisk the milk and instant chocolate pudding mix until set. Add the red food coloring until desired color is reached. It may take 4-5 minutes to thicken. Spread evenly on top of the cream cheese mixture.