Prep Time 20 minutes mins
Cook Time 28 minutes mins
Resting Time 1 hour hr
Total Time 1 hour hr 48 minutes mins
Use room-temperature ingredients to promote a tender crumb and avoid curdling; gel food coloring gives stronger color with less liquid, so adjust to reach a deep red without thinning the batter. Adding hot water blooms the cocoa and keeps the cake ultra moist—do not skip it. Avoid overmixing once flour is added to prevent toughness. If you prefer sturdier bars for transport, chill the frosted cake 30 minutes before slicing and wipe the knife between cuts. Store covered in the fridge up to 4 days; serve at room temperature for the best texture.