Preheat oven to 350 degrees F.
I bake on my favorite perforated baking mats to eliminate any chance of spread, for even baking and pretty undersides of our cookies!
In your mixer bowl (or large bowl with hand-mixer) cream butter and 1 cup (200 g) sugar until smooth. No need to excessively cream as it can lead to cookie spread.
Beat in lemon emulsion and egg. Optional: add a couple drops of yellow food coloring during this step.
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.
For crispest stamping designs, chill dough for at least 3 hours.
Roll dough into balls slightly larger than golf ball size.
Roll dough balls in granulated sugar
Using cookie stamp, center over ball and push down hard. Dough will squeeze out around stamp. Slowly lift/remove stamp.
If dough sticks to stamp, use a lip of the dough to carefully peel the cookie dough off the stamp and place on cookie sheet.
Trim any excess dough around the stamped design, using a circle cookie cutter or pen blade for baking.
Bake at 350 for 12-13 minutes.
Cool cookies on cookie sheet until firm enough to transfer to cooling rack.