Prep Time 20 minutes mins
Cook Time 35 minutes mins
Resting Time 30 minutes mins
Total Time 1 hour hr 25 minutes mins
For clean swirls, keep the red batter slightly thicker than the cheesecake layer so the ribbons stay distinct as they bake, and avoid over-swirling which can muddy the pattern. If using gel food coloring, start with 1 teaspoon and adjust for a rich hue without thinning the batter. Ensure the cream cheese is fully softened to prevent lumps, and mix batters gently to avoid overdeveloping gluten which can toughen the crumb. For fudgier bars, pull them from the oven when the center still has a slight wobble and let carryover heat finish the set; for cakier bars, bake until the toothpick comes out nearly clean. Store covered in the fridge up to 5 days and serve chilled for cleaner cuts or at room temperature for a softer texture.