Prep Time 20 minutes mins
Cook Time 30 minutes mins
Resting Time 1 hour hr
Total Time 1 hour hr 50 minutes mins
Use natural cocoa for the classic tang and color, as Dutch-process can mute the red hue; gel food coloring gives strong color with less liquid, but you can increase or reduce to preference. The hot coffee deepens cocoa flavor without making the cake taste like coffee, though hot water works fine. Room-temperature ingredients help the batter emulsify, preventing tunnels and ensuring a tender crumb. Avoid overmixing once the flour is added to keep the cake moist. If your buttermilk is thick, measure accurately and don’t substitute with plain milk; if needed, make a quick buttermilk by mixing 1 cup milk with 1 tablespoon white vinegar and resting 5 minutes. For clean slices, warm the knife in hot water and wipe between cuts, and store leftovers covered in the fridge for up to 4 days, bringing to room temperature before serving.