Line a baking sheet with parchment and preheat the oven to 350°F.
Cream butter and sugar until light and fluffy.
Mix in the egg, vanilla, and cream until smooth.
Whisk flour and baking powder in a separate bowl.
Fold the dry mixture into the wet just until combined.
Gently fold in crushed raspberries for a marbled look.
Scoop loose, cloud-like mounds of dough onto the baking sheet.
Bake 10–13 minutes until set and lightly puffy.
Cool, then dust with powdered sugar.