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, ⅔ cup Imperial Sugar powdered sugar, ½ teaspoon vanilla extract, 1 teaspoon lemon extract, zest of 1 lemon, 1 tablespoon lemon juice, 2 & ¼ cup all purpose flour, ½ teaspoon salt, yellow gel food coloring