01 - Line a standard 12-cup muffin tin with 8 paper liners, spacing them evenly apart.
02 - In a mixing bowl, combine the graham cracker crumbs, melted butter, and granulated sugar. Stir until the mixture resembles wet sand and holds together when pressed.
03 - Divide the crumb mixture evenly among the 8 paper liners. Using the back of a spoon or a small measuring cup, press the crumbs firmly into an even layer at the bottom of each liner. Place the muffin tin in the refrigerator to chill while preparing the filling.
04 - In a small saucepan, combine 1 cup of fresh blackberries, lemon juice, and culinary lavender buds. Cook over medium heat for 5 to 7 minutes, gently mashing the berries with a spoon as they soften and release their juices. Remove from heat and strain through a fine-mesh sieve, pressing to extract as much liquid as possible. Discard the seeds and lavender buds. Allow the puree to cool completely.
05 - In a medium bowl, beat the softened cream cheese and powdered sugar together using a hand mixer or stand mixer on medium speed until completely smooth and creamy, scraping down the sides as needed.
06 - Add the vanilla extract and the cooled blackberry-lavender puree to the cream cheese mixture. Beat on low speed until evenly combined and the mixture is uniformly tinted purple.
07 - In a separate chilled bowl, whip the heavy cream to stiff peaks using a hand mixer. Using a spatula, gently fold the whipped cream into the cream cheese mixture in three additions, preserving as much volume as possible.
08 - Spoon or pipe the filling evenly into the chilled crusts, filling each liner to just below the rim. Smooth the tops with a small spatula or the back of a spoon.
09 - Refrigerate the mini cheesecakes for at least 4 hours, or ideally overnight, until the filling is firm and fully set.
10 - If making the sauce, combine 1/2 cup fresh blackberries, honey, lemon juice, and dried culinary lavender in a small saucepan. Simmer over medium heat for 5 to 7 minutes, mashing the berries as they break down. Strain through a fine-mesh sieve and let the sauce cool completely before serving.
11 - Carefully remove the cheesecakes from the paper liners. Top each with fresh blackberries and a drizzle of the blackberry-lavender sauce, if desired. Serve chilled.