As a rule, a CTE will NEVER improve performance. A CTE is essentially a disposable view. There are no additional statistics stored, no indexes, etc. It functions as a shorthand for a subquery. In my opinion they can be EASILY overused (I see a lot of overuse in code in my job).
Check the cupcakes at the minimum baking time. If the recommended baking time is 18-22 minutes, check them at 17 or 18 minutes (just a quick peek, make sure not to let too much heat out of the oven). If the tops are rounded and no long appear wet, they may be done.
4. Use a cookie scoop to fill lined mini cupcake pans.* 5. Bake for 14-16 minutes or until cake tester comes out clean. *As I mentioned above, you can also use the excess batter to bake 5-6 regular sized cupcakes in addition to the 48 minis. Bake the regular cupcakes an additional 5-6 minutes. Recipe for vanilla buttercream Ingredients: