Follow these steps carefully to create perfect Raspberry Cheesecake Bites:

Phase 1: Prepare the Raspberry Sauce (This can be done ahead)

1. Combine Raspberry Sauce Ingredients: In a small saucepan, combine the 1 cup of raspberries, 2 tablespoons of granulated sugar, and 1 teaspoon of lemon juice.
2. Cook the Sauce: Place the saucepan over medium heat. Bring the mixture to a gentle simmer, stirring occasionally. As the raspberries cook, they will begin to break down. Use the back of your spoon to gently mash some of them to release more juice and color.
3. Simmer and Thicken: Continue to simmer for about 5-8 minutes, or until the sauce has thickened slightly. If you’re using frozen raspberries, it might take a minute or two longer.
4. Strain (Optional): For a smoother sauce, you can strain the mixture through a fine-mesh sieve to remove the seeds. Press down on the solids with a spoon to extract as much pulp and juice as possible. This step is optional; some prefer the texture of the seeds.
5. Cool Completely: Set the raspberry sauce aside to cool completely. If you’re making it ahead, store it in an airtight container in the refrigerator for up to a week. It needs to be cool before being swirled into the cheesecake batter.

Phase 2: Prepare the Crust and Baking Pan

1. Preheat Oven & Prepare Pan: Preheat your oven to 325°F (160°C). Line a standard 12-cup muffin tin with paper liners. If you have a 24-cup mini muffin tin, that works wonderfully for even smaller, bite-sized treats (baking time will be slightly less).
2. Make Graham Cracker Crumbs: If you’re not using pre-made crumbs, place graham cracker sheets in a food processor and pulse until they form fine crumbs. Alternatively, place them in a zip-top bag and crush them with a rolling pin.
3. Combine Crust Ingredients: In a medium bowl, combine the graham cracker crumbs, ¼ cup of granulated sugar, and 6 tablespoons of melted unsalted butter. Stir with a fork until the mixture is well combined and resembles wet sand.
4. Press Crust into Liners: Distribute the crumb mixture evenly among the prepared muffin cups (about 1 to 1.5 tablespoons per standard-sized cup). Press the crumbs firmly into the bottom of each liner using the bottom of a small glass or a spoon. This creates a solid base for your cheesecake.
5. Pre-Bake Crust (Optional but Recommended): Bake the crusts for 5-7 minutes. This step helps the crust to set and become crispier. Remove from the oven and set aside to cool slightly while you prepare the filling.

Phase 3: Make the Cheesecake Filling

1. Beat Cream  Cheese: In a large mixing bowl, add the two packages of softened full-fat cream cheese. Using an electric hand mixer or a stand mixer fitted with the paddle attachment, beat the cream cheese on medium speed until it’s completely smooth and creamy, with no lumps. This might take 2-3 minutes. Scrape down the sides and bottom of the bowl frequently. This step is crucial for a silky cheesecake.
2. Add Sugar and Flour: Gradually add the ¾ cup of granulated sugar and 2 tablespoons of all-purpose flour to the beaten cream cheese. Mix on low speed until just combined and smooth. Avoid overmixing from this point onwards to prevent incorporating too much air, which can lead to cracks.
3. Incorporate Wet Ingredients: Add the ¼ cup of room temperature sour cream and 1 teaspoon of pure vanilla extract. Mix on low speed until just incorporated. Scrape down the bowl again.
4. Add Eggs One at a Time: Add the room temperature eggs one at a time, beating on low speed just until each egg is incorporated. Overbeating after adding eggs is a common cause of cracked cheesecakes (though less critical for bites, it’s good practice). The batter should be smooth and homogenous.

Phase 4: Assemble and Bake the Cheesecake Bites

1. Fill Muffin Cups: Divide the cheesecake batter evenly among the muffin cups, filling each one about two-thirds to three-quarters full, right on top of the pre-baked crusts. An ice cream scoop can be helpful for even portioning.
2. Add Raspberry Swirl: Dollop about ½ to 1 teaspoon of the cooled raspberry sauce onto the top of the cheesecake batter in each muffin cup.
3. Create Swirls: Using a toothpick or a thin skewer, gently swirl the raspberry sauce into the cheesecake batter. Don’t over-swirl, or you’ll lose the distinct raspberry pattern. A few gentle figure-eights or circular motions are perfect.
4. Bake: Place the muffin tin in the preheated oven. Bake for 18-22 minutes for standard-sized muffin cups (or 12-15 minutes for mini muffin cups). The cheesecake bites are done when the edges are set, and the centers are almost set but still have a very slight jiggle. They will continue to cook and firm up as they cool. Be careful not to overbake, as this can lead to a dry or rubbery texture.
5. Cool Gradually: Once baked, turn off the oven and prop the oven door open slightly with a wooden spoon. Let the cheesecakes cool in the turned-off oven for about 20-30 minutes. This gradual cooling helps prevent cracking.
6. Cool at Room Temperature: Carefully remove the muffin tin from the oven and let the cheesecake bites cool completely at room temperature on a wire rack (about 1-2 hours).
7. Chill Thoroughly: Once cooled to room temperature, cover the muffin tin loosely with plastic wrap and transfer it to the refrigerator. Chill for at least 4 hours, but preferably overnight. Chilling is essential for the cheesecakes to fully set and for the flavors to meld.

Phase 5: Serve and Garnish

1. Remove from Liners: Once thoroughly chilled, gently remove the Raspberry Cheesecake Bites from the paper liners.
2. Garnish (Optional): Just before serving, you can garnish each bite with an extra fresh raspberry and a light dusting of powdered sugar for an elegant touch.
3. Serve Chilled: These bites are best served chilled directly from the refrigerator.