1. Preheat your oven to 325°F (160°C). Prepare a 12-cup muffin tin by lightly greasing each cup or using paper liners.
2. In a small bowl, combine melted butter and brown sugar until smooth. Spoon about 1 tablespoon of this mixture into the bottom of each muffin cup.
3. Top the brown sugar layer with a small spoonful of drained crushed pineapple, spreading it evenly.
4. In a medium bowl, beat the softened cream cheese until smooth and creamy, about 2-3 minutes using a hand mixer. This step is key to avoid lumps—take your time here!
5. Add granulated sugar and continue to beat until well combined and fluffy.
6. Mix in the egg and vanilla extract, beating just until incorporated.
7. Fold in the sour cream gently to keep the batter light and creamy.
8. In a separate bowl, combine graham cracker crumbs, melted butter, and a pinch of salt. Stir until the mixture resembles wet sand.
9. Sprinkle about 1 tablespoon of the graham cracker crust mixture evenly over the pineapple layer in each muffin cup.
10. Pour the cream cheese batter over the crust, filling each cup nearly to the top.
11. Bake for 20-25 minutes, until the edges are set but the center still has a slight wobble—a sign of perfect cheesecake texture.
12. Remove from oven and allow to cool in the pan for 10 minutes, then transfer to a wire rack to cool completely.
13. Once cooled, refrigerate for at least 2 hours or overnight for the best flavor and texture.

From my experience, patience is the secret ingredient here. I remember rushing a batch once and getting cracks on top—not the end of the world, but taking the time to cool and chill makes all the difference.