Preheat your oven to 325°F (160°C). Line two standard cupcake tins with 18 paper liners.
In a medium bowl, combine the graham cracker crumbs, melted butter, and brown sugar. Stir it all together until it looks like moist sand.
Spoon about 1 ½ tablespoons of this mixture into the bottom of each lined cupcake well. Use the back of a small measuring cup or a glass to gently press the crust down firmly.
Bake the crusts for 9 to 12 minutes, just until they start to turn a light golden color. Take them out of the oven and let them cool completely while you prepare the filling.
In a large bowl (or using your stand mixer), beat the powdered sugar and fresh lemon zest together for about 2 minutes until it smells wonderfully fragrant.
Add the softened cream cheese and beat on low speed until it's light, fluffy, and completely smooth. Don't forget to scrape down the sides of the bowl!
Stir in the sour cream (or healthy Greek yogurt), lemon juice, and vanilla extract until everything is fully combined.
Gently mix in the eggs, one at a time, just until they're blended. Be careful not to overmix, as this helps prevent cracks in your cheesecakes.
Evenly divide the creamy cheesecake filling among your prepared crusts, filling each about ¾ full (around ¼ cup per liner).
Top each cheesecake with about a tablespoon of blueberry pie filling. Then, grab a knife or a toothpick and gently swirl the blueberry filling into the cheesecake batter for a pretty marbled look.
Bake for 15 to 20 minutes, or until the edges are just set but the center still has a slight, delicate wiggle. Avoid baking too long to keep them perfectly creamy.
Remove them from the oven and let them cool completely on a wire rack at room temperature.
Once cool, cover them lightly with plastic wrap and chill in the refrigerator for at least 2 hours (or ideally overnight). This step is key for them to firm up and get super creamy!
Before serving, feel free to add a dollop of whipped cream, some fresh blueberries, and a tiny sprig of mint for an extra special and refreshing touch.