Pre-heat oven to 350° F.
Using an electric mixer, beat the butter and sugar until it is lightened and creamed together.
1 Stick butter, ½ Cup sugar
Add the egg and vanilla extract and continue to beat until the egg and butter sugar mixture are well incorporated.
1 egg, ¼ Tsp vanilla extract
To the bowl add the flour, jello, baking soda and powder, and zest if using and stir in by hand until just incorporated as to not over mix with the electric mixer.
1 Cup flour, ¼ Cup Lemon Flavor Jello Instant Pudding, ¼ Tsp baking soda, ½ Tsp baking powder, ½ Tbsp lemon zest
Scoop the dough into 12 round cookies, and bake on a silicone baking mat or parchment paper. Bake for 12-14 minutes.
Let the cookies cool for 3 minutes on the baking sheet and than transfer to a cooling rack. Once cooled dust with powdered sugar and store in an airtight container up to 3 days.