Preheat oven to 350 degrees F. Beat eggs and sugar until foam appears on the surface (1 minute). In another bowl mix together dry ingredients, add and incorporate together.
Pour in the melted butter and stir quickly until the ingredients are combined. Add lemon zest, lemon curd and lemon juice. Stir until smooth.
Divide batter into muffin liners equally. Put on to middle rack and bake for 18-20 minutes for regular sizes or 11-12 minutes for mini muffins or until middle springs back when touched gently.
Use a spoon to scoop hot muffins out of tin and on to cooling rack to cool.