Preheat the oven to 170°C.
Soften the room-temperature butter and cream cheese until smooth.
Add erythritol and mix well.
Add eggs one at a time, mixing after each addition.
Sift in the almond flour, cocoa powder, and baking powder.
Add milk, vanilla extract, and red food coloring, then mix thoroughly.
Pour the batter into muffin molds.
Bake in a 170°C oven for 20 minutes.
Let cool completely and top with cream cheese frosting.