Making Blueberry Tiramisu is straightforward if you follow these simple steps:

1. Prepare Blueberries: In a bowl, mash half of the blueberries with a fork. Set aside the other half for layering and garnish.

2. Make the Cream Mixture: In a separate bowl, beat together mascarpone cheese, heavy cream, granulated sugar, and vanilla extract until light and creamy.

3. Combine Blueberries: Gently fold the mashed blueberries into the mascarpone mixture, being careful not to overmix.

4. Mix Coffee: In a shallow dish, combine brewed coffee and coffee liqueur (if using).

5. Dip Ladyfingers: Quickly dip each ladyfinger in the coffee mixture, ensuring they soak but do not become too soggy.

6. Layer the Dessert: Start by placing a layer of dipped ladyfingers in the bottom of a serving dish.

7. Add Cream Layer: Spread half of the blueberry mascarpone mixture over the ladyfingers, covering them completely.

8. Add Blueberries: Sprinkle half of the reserved blueberries over the cream layer.

9. Repeat Layers: Place another layer of dipped ladyfingers over the blueberries and top with the remaining mascarpone mixture. Again, sprinkle the rest of the blueberries on top.

10. Chill: Cover the dish with plastic wrap or a lid and refrigerate for at least 4 hours, preferably overnight.

11. Serve: Before serving, garnish with fresh mint leaves if desired for an added touch of elegance.

These steps will guide you in creating this incredible dessert effortlessly, delighting your taste buds while impressing your guests!