01 - Preheat oven to 325°F. Line a 12-cup muffin tin with paper liners.
02 - Combine crushed chocolate cookies and melted butter in a bowl. Mix until crumbs are evenly moistened. Divide the mixture among liners (about 1 tablespoon per cup) and press firmly to form bases.
03 - Beat cream cheese and granulated sugar in a large bowl until smooth and creamy. Add egg, vanilla extract, and sour cream. Beat until just combined—avoid overmixing.
04 - Spoon cheesecake filling evenly over each crust (about 2 tablespoons per cup), smoothing the tops.
05 - Bake for 16–18 minutes, until centers are just set (slight jiggle is acceptable).
06 - Remove from oven and let cool in the tin for 30 minutes. Transfer to refrigerator and chill for at least 2 hours.
07 - Whip cold heavy cream with powdered sugar until stiff peaks form.
08 - Pipe or dollop whipped cream onto each cheesecake. Garnish with chopped or whole Mini Eggs and optional pastel sprinkles. Serve chilled.