Here is a goal: What ingredients will I need to make butter cookies?

Which way makes more sense to accomplish this goal?

Select from the following.
[a]. 120 g all purpose pancake mix 35 g powdered sugar 100 g unsalted butter (at room temperature) 1 egg (medium) 1/2 teaspoon baking powder 1/4 teaspoon salt 1 tablespoon vanilla extract 2 tablespoons granulated white sugar (for decoration);
[b]. 120 g all purpose flour 35 g powdered sugar 100 g unsalted butter (at room temperature) 1 egg (medium) 1/2 teaspoon baking powder 1/4 teaspoon salt 1 tablespoon vanilla extract 2 tablespoons granulated white sugar (for decoration);
[b].