Whisk together the flour, baking powder, and baking soda. Set aside.
Beat butter and sugar together in a large bowl until light and fluffy.
Beat in egg, lemonade concentrate, lemon zest and juice.
Stir in red food colouring if using.
Add flour 1 cup at a time, stirring to combine after each addition.
Cover bowl and refrigerate for one hour.
Preheat oven to 350°F and line a cookie sheet with parchment paper.
Scoop dough onto prepared cookie sheet about 2 inches apart.
Bake in preheated oven for 11 minutes. Bottoms will start to brown and tops will still be a little wet.
Cool on pan for 3 minutes then transfer to a wire rack to cool completely.