In a large bowl, cream together the butter and sugar until fluffy.
Beat in the egg, strawberry preserves and vanilla.
In a separate bowl, add the flour, baking powder and salt and whisk to combine.
Add the flour mixture to the butter mixture. Mix until just combined. You may add food coloring and mix again until dough is uniformly colored, if desired. The dough will be very crumbly.
Line 2 baking sheets with parchment paper. These cookies are fairly large, so it's best to bake 6 on each baking sheet, so they are not crowded.
Divide the dough into 12 equal portions and form each portion into a ball and place evenly spaced on lined baking sheets. *NOTE: These cookies are very large. You may also make smaller cookies and divide the dough into 24 equal portions. The baking time will just need to be adjusted.
Refrigerate for at least 30 minutes.
Preheat the oven to 375 degrees Fahrenheit.
Then, remove cookies from the refrigerator and bake on the center rack of the oven for 16 to 20 minutes. After the cookies have been baking for 10 minutes, remove from oven and flatten slightly with the back of a spatula. Return cookies to the oven to continue baking until done.
Cool for 5 minutes on the baking sheets. Then, transfer to a rack to cool completely.