01 - Line a standard 12-cup muffin tin with paper liners, or set out silicone molds on a flat tray.
02 - Pulse the biscuits or graham crackers in a food processor until fine crumbs form. Drizzle in the melted butter and pulse until the mixture is evenly moistened and resembles wet sand.
03 - Divide the crumb mixture evenly among the prepared liners, pressing each one down firmly with the back of a spoon or a small flat-bottomed glass to form a compact base. Place the tin in the refrigerator while you prepare the filling.
04 - In a medium mixing bowl, beat the room-temperature cream cheese and powdered sugar together with a hand mixer or stand mixer on medium speed until completely smooth and creamy, scraping down the sides as needed.
05 - In a separate chilled bowl, whip the cold heavy cream with a mixer on medium-high speed until stiff peaks hold their shape when the beaters are lifted.
06 - Gently fold the whipped cream into the cream cheese mixture using a spatula, being careful not to deflate it. Add the orange zest, fresh orange juice, and vanilla extract, folding until evenly incorporated and the filling is silky smooth.
07 - Spoon or pipe the filling over the chilled biscuit bases, dividing it evenly among all six cups. Smooth the tops with a small offset spatula or the back of a spoon.
08 - Refrigerate the cheesecakes for at least 3 hours, or until the filling is firm and fully set throughout.
09 - Just before serving, top each cheesecake with fresh orange segments, a sprinkle of orange zest, and a few mint leaves if desired.