01 - Line a standard 12-cup muffin tin with 8 paper liners, spacing them evenly apart.
02 - In a medium 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 liners. Using the back of a spoon or a small measuring cup, press the crumbs firmly into the bottom of each liner to create a compact, even crust. Place the tin in the refrigerator to chill while preparing the filling.
04 - In a small saucepan, combine 1 cup of fresh blackberries, 1 tablespoon of lemon juice, and 1 teaspoon of culinary lavender buds. Cook over medium heat for 5 to 7 minutes, mashing the berries with a spoon as they soften and release their juices. Remove from heat, strain through a fine-mesh sieve to remove seeds and lavender buds, and let the puree cool completely.
05 - In a medium bowl, use a hand mixer to beat the softened cream cheese and powdered sugar together on medium speed until completely smooth and creamy, about 2 minutes. Scrape down the sides of the bowl as needed.
06 - Add the vanilla extract and the cooled blackberry-lavender puree to the cream cheese mixture. Beat on low speed until evenly incorporated and the mixture is uniformly purple in color.
07 - In a separate chilled bowl, whip the heavy cream until stiff peaks form. Using a spatula, gently fold the whipped cream into the cream cheese mixture in three additions, being careful not to deflate the cream. Work with light, sweeping motions to maintain an airy texture.
08 - Spoon or pipe the filling evenly into the chilled crusts, dividing it among all 8 cups. Smooth the tops with a small spatula or the back of a spoon.
09 - Refrigerate the mini cheesecakes for at least 4 hours, or preferably overnight, until the filling is firm and fully set.
10 - If making the sauce, combine 1/2 cup fresh blackberries, honey, 1 teaspoon lemon juice, and 1/4 teaspoon dried culinary lavender in a small saucepan. Simmer over medium heat for 5 to 7 minutes, mashing the berries as they cook. Strain through a fine-mesh sieve and let cool before serving.
11 - Carefully remove the cheesecakes from the muffin tin. Peel away the paper liners and arrange on a serving plate. Top each cheesecake with fresh blackberries and a drizzle of the blackberry lavender sauce if desired.