Step 1: Prepare the Peach Puree
Begin by washing and chopping the peaches. Place the chopped peaches into a blender or food processor and puree until completely smooth. To ensure a silky texture, strain the puree through a fine-mesh sieve to remove any fibrous bits. This step is crucial for achieving a smooth panna cotta layer. Reserve 1/3 cup of the peach puree in a jar and refrigerate. This will be used as a final layer of flavor just before serving.
Step 2: Bloom the Gelatin
In separate small bowls, sprinkle half of the gelatin (1/4 tbsp) over 3 tbsp of whole milk for the peach layer, and the other half (1/4 tbsp) over 1/4 cup of whole milk for the vanilla layer. Allow the gelatin to bloom for about 5-10 minutes. Blooming the gelatin is essential for it to dissolve properly and provide the right consistency for the panna cotta.
Step 3: Prepare the Peach Panna Cotta Base
In a medium saucepan, combine the heavy cream, granulated sugar, and a pinch of salt for the peach layer. Heat over medium heat, stirring occasionally, until the mixture begins to simmer. Do not boil. Once simmering, remove the saucepan from the heat.
Step 4: Incorporate Gelatin and Peach Puree
Add the bloomed gelatin mixture to the warm cream mixture and whisk until the gelatin is completely dissolved. Ensure there are no lumps. Then, gently stir in the peach puree. Mix until everything is well combined, creating a homogenous, peachy cream mixture.
Step 5: Pour and Chill the Peach Layer
Pour the peach panna cotta mixture evenly into serving cups or glasses. Leave some space at the top for the vanilla layer. Carefully place the filled cups into the refrigerator and chill for at least 2 hours, or until the peach layer is fully set. This step is crucial to ensure that the layers don't mix when the vanilla layer is added.
Step 6: Prepare the Vanilla Bean Panna Cotta Base
In a separate medium saucepan, combine the heavy cream, brown sugar, granulated sugar, vanilla bean paste (or scraped vanilla bean), and a pinch of salt for the vanilla layer. Heat over medium heat, stirring occasionally, until the mixture begins to simmer. Do not boil. Once simmering, remove the saucepan from the heat.
Step 7: Incorporate Gelatin into Vanilla Mixture
Add the bloomed gelatin mixture to the warm vanilla cream mixture and whisk until the gelatin is completely dissolved. Make sure there are no lumps.
Step 8: Gently Pour Vanilla Layer
Once the peach layer is firm, gently pour the vanilla bean panna cotta mixture over the set peach layer in each cup. Use a spoon to help distribute the vanilla mixture evenly and to avoid disturbing the peach layer.
Step 9: Chill Until Set
Return the cups to the refrigerator and chill for at least 3 hours, or preferably overnight, to ensure the vanilla bean panna cotta is fully set. Patience is key here to achieve the perfect creamy texture.
Step 10: Prepare Rum Whipped Cream
In a mixing bowl, combine the heavy cream and white rum. Using an electric mixer or whisk, whip the mixture until medium peaks form. Be careful not to overwhip, as it can turn into butter.
Step 11: Assemble and Serve
Warm the reserved peach puree until it is pourable. Remove the panna cotta cups from the refrigerator. Spoon a layer of the warmed peach puree over the top of the vanilla bean panna cotta. Add a dollop of the rum whipped cream on top of the peach puree. Garnish with fresh peach slices, if desired. Serve immediately and enjoy!