Follow directions on box for preheating oven and greasing cupcake pan.
Mix flaxseed and water in a small bowl to make your flax eggs. Set aside.
Mix cake mix, oil, and flaxseed in a large mixing bowl. Add flax eggs.
Mix to combine and follow directions on box for baking and cooling.
When cool, frost with vanilla frosting. Sprinkle lemon zest on top. Serve and enjoy!