Preheat oven to 350 degrees F.
I use parchment paper on my cookies sheets and reuse them for all my batches that day.
In your mixer bowl (or large bowl with hand-mixer) cream butter and sugar until smooth, at least 1 minute.
Beat in vanilla extract and egg
In a separate bowl, combine baking powder, salt and flour. Add to wet ingredient mixing bowl a little at a time.
Mix until thoroughly blended
Add 1/2 tsp watermelon super strength flavor and blend. This amount will give a decent flavor. Add more or less if you desire a lighter or stronger flavor. Note that your dough will turn light pink!
Chilling the dough is not necessary! I have tried many different ways of rolling out dough and always come back to the old-fashioned way; a sheet of wax paper that has been floured.
I usually divide the dough into 3 chunks and roll out each onto a floured surface and cut. In my experience, this dough works best for cookies at 1/4" thick. I use my Joseph Joseph rolling pin which does the measuring for me – genius!
Bake at 350 for 7-8 minutes, depending on size of cookie. I also suggest baking similar-sized cookies together.
Cool cookies on cookie sheet until firm enough to transfer to cooling rack.