01 -
Combine blackberries, granulated sugar, and lemon juice in a small saucepan. Cook over medium heat for 5-7 minutes, stirring occasionally, until berries soften and release juices. Strain through a fine-mesh strainer and let cool to room temperature.
02 -
In a large mixing bowl, whip the cold heavy cream with powdered sugar and vanilla extract until stiff peaks form.
03 -
Gently fold the cooled blackberry puree into the whipped cream until fully combined, creating a light and fluffy mousse.
04 -
Spoon or pipe the mousse into dessert cups or bowls, smoothing the tops. Refrigerate for at least 2 hours to set.
05 -
Before serving, garnish with fresh blackberries, a dollop of whipped cream, and mint leaves if desired.