Cake Citron

When a preparation calls for the use of lemons, remember a few simple rules. Always choose bright yellow, fully ripened fruit without bruises or pock marks. The lemons should seem heavy for their size, have a bit of an oily residue on the skin, and have a strong, aromatic lemon scent. When incorporating the zest (ground lemon rind), wash the skin thoroughly and only shave the exterior of the skin, leaving the white interior skin (which tends to be overly bitter) intact. When squeezing the j