For a richer flavor, consider using browned butter instead of canola oil. If you don't have buttermilk, you can make a substitute by adding 1.75 tablespoons of lemon juice or white vinegar to regular milk, then adding milk to equal 1.75 cups. Let it sit for 5 minutes to curdle slightly before using. Use a light-colored pan to prevent over-browning of the cake. If the top of the cake starts to brown too quickly, tent it loosely with foil during the last 20 minutes of baking.