Preparing the Blueberries: Combine fresh blueberries, butter and lemon juice in a pot on the stove. Cook over medium heat for several minutes, until the berries soften and their juices run to make a light compote.
Prepare the Cream Base: In a mixing bowl, beat heavy cream, softened cream cheese, erythritol and vanilla extract. Beat using a hand whisk or an electric mixer until creamy, fluffy and slightly stiff.
Combine: Once the blueberry mixture cools slightly, gently fold it into the creamy base. This ensures the cream stays airy while blending in the berry flavor.
Chill: Once the mixture is combined, divide it into serving bowls or cups. Chill for 30 minutes or more to set the dessert and blend the flavors together perfectly.
Serve: Garnish with a couple of fresh blueberries or a few nuts as desired, and eat up your keto-friendly treat!