For the Cookie Cups:
Warm up your oven to 325°F (160°C) and get 24 mini muffin cups ready with silicone or parchment liners.
In a big bowl, whisk together the almond flour, brown sugar replacement, cocoa powder, baking powder, and salt until they're nicely mixed.
Stir in the melted butter, egg, and vanilla extract until a soft dough forms.
Scoop about 1 tablespoon of dough into each prepared muffin cup. Gently press the dough into the bottom and up the sides to create little cups.
Bake for 12 to 15 minutes, until the edges feel firm. Take them out of the oven, and while they're still warm, gently press down the centers again with a spoon to make neat wells.
Let them cool completely in the pan.
For the Peanut Butter Filling:
In a medium bowl, beat the peanut butter and softened cream cheese together until smooth and creamy.
Mix in the powdered sweetener until it's well combined, then add the tablespoon of heavy cream and beat again until the filling is perfectly smooth.
Evenly spoon this delicious peanut butter filling into the cooled cookie cups.
For the Chocolate Ganache:
In a small saucepan, gently heat the ⅓ cup heavy cream and ¼ cup powdered sweetener over medium-low heat until it just begins to simmer.
Remove the pan from the heat, add the chopped unsweetened chocolate, and let it sit for about 5 minutes to melt.
Add the ½ teaspoon vanilla extract and whisk everything until you have a smooth, glossy ganache.
Carefully spoon about 1 teaspoon of the warm ganache over the peanut butter filling in each cup.
Pop them into the refrigerator for about 20 minutes to help the chocolate set beautifully.