Heat oven to 325 F and line a 12 cup muffin pan with paper liners
Mix crushed Oreos with melted butter and salt until evenly moistened then press about 1 1 2 tbsp into each liner
Bake crusts until set about 5 minutes then cool 5 minutes.
Filling and Bake
Beat cream cheese and sugar on medium speed until smooth then mix in sour cream and vanilla until combined
Add eggs one at a time mixing on low just until incorporated then fold in chopped Oreos
Divide batter evenly over crusts filling nearly to the top
Bake until edges are set and centers are slightly jiggly 14 to 17 minutes.
Cool and Chill
Cool in pan 30 minutes then refrigerate at least 3 hours or overnight
Top each cup with a mini Oreo and whipped cream if using just before serving.
Notes
1. Use full fat cream cheese for best texture 2. Do not overmix after adding eggs to prevent cracks 3. Swap sour cream with Greek yogurt 4. Freeze up to 1 month and thaw overnight in the refrigerator