1 Make the cookie dough: In a medium bowl, whisk together the flour, baking powder, and salt.
Using a stand mixer or hand mixer, beat together the softened butter and sugar until creamy. Mix in the egg and vanilla, followed by the whipping cream. With the mixer on low speed, mix in the flour mixture just until no more dry streaks of flour remain.
2 Roll out and chill: Divide the dough two. Roll each half out between two sheets of parchment paper. (The parchment makes this sticky dough easier to roll out and the dough also chills more quickly.)
Transfer the sheets of cookie dough, still sandwiched between parchment, to the fridge. (Place on baking sheets if neeDed so you can balance the sheets on top of other items in your fridge.)
Chill for at least one hour or up to overnight.
3 Heat the oven to 400°F.
4 Cut out the cookie shapes: Peel off the top layer of parchment from one of…