Preheat the oven to 350°F (175°C).
In a mixing bowl, combine the flour, cocoa powder, powdered sugar, melted butter, salt, and vanilla extract. Mix until a dough forms.
Roll the dough into small balls and flatten them into circles about 3 inches in diameter.
Place the dough circles on a baking sheet lined with parchment paper and bake for 10 minutes. Let them cool completely.
In another bowl, beat the softened cream cheese and granulated sugar together until smooth. Add the vanilla extract and mix well.
In a separate bowl, whip the heavy cream until stiff peaks form. Gently fold the whipped cream into the cream cheese mixture.
In a small bowl, combine chopped strawberries with lemon juice and let sit for 5 minutes.
To assemble, take a cooled taco shell, fill it with the cream cheese mixture, and top with the strawberry mixture.
Garnish with mint leaves before serving.