01 - Line a 12-cup muffin tin with paper liners or set out silicone molds on a flat baking sheet.
02 - Combine graham cracker crumbs, granulated sugar, and melted butter in a bowl, stirring until the mixture resembles wet sand. Press approximately 1 tablespoon of the crumb mixture firmly into the bottom of each liner. Place the tin in the refrigerator to set while preparing the filling.
03 - Beat the softened cream cheese in a large bowl until completely smooth and free of lumps. Add powdered sugar, vanilla extract, lemon zest, and ground lavender, then mix until fully incorporated and creamy.
04 - In a separate chilled bowl, whip the heavy cream to stiff peaks using an electric mixer or whisk. Gently fold the whipped cream into the cream cheese mixture in three additions, preserving as much air as possible, until the filling is smooth and fluffy.
05 - Spoon or pipe the lavender filling evenly over the chilled crusts, dividing it among all 12 cups. Smooth the tops with a small spatula or the back of a spoon.
06 - Cover the muffin tin tightly with plastic wrap and refrigerate for at least 4 hours, or until the filling is firm and set throughout.
07 - Combine fresh blackberries, granulated sugar, and lemon juice in a small saucepan over medium heat. Cook for about 5 minutes, stirring frequently and gently mashing the berries with a spoon, until the mixture reduces to a syrupy consistency. Remove from heat and let cool completely.
08 - Spoon the cooled blackberry compote over each mini cheesecake. Garnish with a sprig of fresh lavender or a whole blackberry if desired, then serve immediately.