This recipe is best approached by preparing each of the three components separately before the final, fun assembly.

Step 1: Prepare the Warm Peach Filling

1. Melt and Combine: In a medium saucepan or skillet over medium heat, melt the 1/4 cup of unsalted butter. Once melted, add the diced peaches, brown sugar, ground cinnamon, and ground nutmeg.
2. Cook the Peaches: Stir everything together until the peaches are well-coated. Allow the mixture to cook, stirring occasionally, for about 5-7 minutes. The peaches will start to soften, and the brown sugar will dissolve, creating a beautiful, syrupy sauce. You’ll smell the incredible aroma of a cobbler baking, right on your stovetop.
3. Thicken the Filling: In a small bowl, whisk together the 1 tablespoon of cornstarch and 2 tablespoons of water until completely smooth. This is your slurry. While stirring the peaches constantly, slowly pour the slurry into the saucepan.
4. Simmer and Set Aside: Continue to stir and cook for another 1-2 minutes. You will see the sauce visibly thicken into a luscious, glossy filling. Once thickened, remove the pan from the heat and stir in the 1 teaspoon of vanilla extract. Set the peach filling aside to cool slightly while you prepare the other components. It’s best when assembled warm, not piping hot.

Step 2: Prepare the Graham Cracker Crumble

1. Combine Ingredients: In a medium bowl, combine the 1 1/2 cups of graham cracker crumbs, 2 tablespoons of granulated sugar, and 6 tablespoons of melted unsalted butter.
2. Mix Thoroughly: Use a fork to mix the ingredients until all the crumbs are evenly moistened by the butter. The texture should be similar to wet sand. For an extra toasty flavor, you can spread this mixture on a baking sheet and bake at 350°F (175°C) for 5-7 minutes until fragrant, then let it cool completely. However, this is an optional step; the no-bake version is just as delicious. Set the crumble aside.

Step 3: Prepare the Creamy Cheesecake Filling

1. Beat the Cream Cheese: In a large mixing bowl, using a hand mixer or a stand mixer with the paddle attachment, beat the softened 8 ounces of cream cheese on medium speed until it is completely smooth and creamy. Scrape down the sides of the bowl to ensure there are no lumps. This is the most important step for a silky-smooth filling.
2. Add Sugar and Vanilla: Add the 1/2 cup of powdered sugar and 1 teaspoon of vanilla extract to the cream cheese. Beat again on low speed until just combined, then increase to medium and beat until smooth.
3. Whip the Cream: In a separate, clean bowl, pour in the 1 1/2 cups of cold heavy whipping cream. Using a mixer with the whisk attachment, whip the cream on medium-high speed until stiff peaks form. This means when you lift the beaters out of the cream, a peak will form and hold its shape.
4. Fold and Combine: Gently fold about one-third of the whipped cream into the cream cheese mixture using a spatula. This lightens up the dense cream cheese base. Once incorporated, add the remaining whipped cream and continue to fold gently until the mixture is uniform in color and texture. Be careful not to overmix, as this will deflate the whipped cream and make the filling heavy.

Step 4: Assemble the Peach Cobbler Parfaits

1. Choose Your Vessels: Select your serving glasses. Clear glasses, mason jars, stemless wine glasses, or small trifle bowls work beautifully as they showcase the distinct layers. You should have enough for about 6-8 parfaits, depending on the size of your glasses.
2. First Layer (Crumble): Spoon about 1-2 tablespoons of the graham cracker crumble mixture into the bottom of each glass. Gently press it down with the back of the spoon to create a firm base.
3. Second Layer (Cheesecake Filling): Spoon or pipe a generous layer of the creamy cheesecake filling over the crumble. Using a piping bag (or a ziplock bag with the corner snipped off) can help you create cleaner layers without smudging the sides of the glass.
4. Third Layer (Peach Filling): Carefully spoon a layer of the warm (not hot) peach filling over the cheesecake layer. Be gentle so the layers don’t mix too much.
5. Repeat the Layers: Repeat the process: another layer of cheesecake filling, followed by another layer of peaches.
6. Final Topping: Finish each parfait with a final sprinkle of the remaining graham cracker crumble on top.
7. Garnish and Serve: For a finishing touch, you can add a sprig of fresh mint or a thin slice of a fresh peach on top. Serve immediately while the peaches are still warm for a delightful temperature contrast, or chill for at least 30 minutes to allow the flavors to meld.