Cream the butter and powdered sugar in a large bowl. Add in the vanilla extract, lemon extract, lemon zest, and lemon juice, add in a tiny bit of yellow food coloring now if you are using it, and mix again. Add in the flour and salt and mix on low speed until dough forms.
1 cup butter, 2/3 cup Imperial Sugar powdered sugar, 1/2 tsp vanilla extract, 1 tsp lemon extract, zest of 1 lemon, 1 tbsp lemon juice, 2 & 1/4 cup all purpose flour, 1/2 tsp salt, yellow gel food coloring