[‘Do not skip the coffee; it enhances the chocolate flavor without tasting like coffee.’, ‘Use room temperature eggs and buttermilk for a smooth batter and tender crumb.’, ‘Watch bake time closely to avoid overbaking and drying out the cake.’, ‘Cool cakes completely before frosting to prevent melting and sliding.’, ‘Use fresh Dutch-processed cocoa powder for best flavor.’, ‘If doubling the recipe, adjust baking time and ensure enough pans.’, ‘For dairy-free version, substitute buttermilk with almond or oat milk plus vinegar and use coconut oil instead of vegetable oil.’, ‘For gluten-free version, use a gluten-free flour blend with xanthan gum.’]