Preheat the oven to 275°F (135°C).
Line a standard 12-cavity muffin pan with cupcake liners.
Place one Golden Oreo cookie flat in the bottom of each liner.
Add the softened cream cheese to a large mixing bowl or the bowl of a stand mixer.
Beat until smooth and fluffy, scraping down the sides of the bowl as necessary.
Add the granulated sugar and beat until evenly incorporated.
Add the sour cream, egg, vanilla extract, lemon juice, and lemon zest.
Mix on low to medium-low speed just until smooth and combined. Avoid excessive mixing once the egg has been added.
Gently fold the blueberries into the cheesecake mixture with a spatula.
Divide the batter evenly between the prepared muffin cups, filling each almost to the top.
Bake for 22–24 minutes, or until the edges appear set and the centers retain a slight wobble.
Remove the muffin pan from the oven and place it on a wire cooling rack.
Allow the cheesecakes to cool to room temperature.
Transfer the pan to the refrigerator and chill the Lemon Blueberry Cheesecake Cups for at least 2 hours.
Once thoroughly chilled, carefully remove the cheesecakes from the muffin pan and peel away the cupcake liners.
Top with cooled blueberry sauce and whipped cream before serving, if desired.