Welcome to MugCake Monday! Celebrate Mug Cake Monday with this Lemon Zest Delight, a quick, fluffy lemon mug cake made in minutes. Perfect for citrus lovers craving a light, zesty treat! You have no idea how excited I am to finally start this little tradition. I’ve been making mug cakes here and there for the longest time. I make them when cravings strike. I also make them when I’m too tired to bake a full cake. Sometimes, I make them when I simply want something warm and sweet in under five minutes. But recently, I had a revelation. Why not dedicate an actual day to celebrate this little guilty pleasure of mine? And what better day than Monday?