Line the bottom of an 8-inch (20 cm) diameter spring form cake pan with parchment paper.
Preheat the oven to 350 degrees F.
In a mixer bowl whisk together eggs with Stevia until it’s fluffy (about 5-7 min), add vanilla extract.
In a separate bowl, combine almond flour, rice flour, cocoa powder, and baking powder.
Add the dry ingredients to wet ingredients and mix carefully until smooth
Transfer the batter to the prepared pan.
Bake for 15 to 17 minutes until a toothpick comes out clean when inserted into the center.
Remove the cake from the pan and cool completely.
Pour the evaporated milk, almond milk, and vanilla into a nonstick saucepan and bring to a boil on a medium high heat. Leave for cool slightly for about 2 min.
Meanwhile, whisk the egg yolks with the corn starch in a medium bowl. Then pour half of the hot milk into the egg yolks and whisk immediately.
Pour this mixture back into the saucepan with another half of milk and cook on low heat stirring constantly for a few minutes until it’s thick enough.
Remove the saucepan from the heat and cool the milk mixture, stirring occasionally to room temperature.
In a small microwave-safe bowl combine the unflavored gelatin and water and let bloom for 5 min.
Meanwhile, place greek yogurt, cream cheese, and cooled milk mixture into a blender or a large bowl and blend or mix until smooth.
Put the bowl with the gelatin into a microwave for about 10 sec. or into a bowl with hot water until gelatin is completely melted
Place the melted gelatin into the bowl with mousse mixture, add some sweetener and mix again to combine.
Prepare the soaking mixture. Just combine e espresso with evaporated skimmed milk.
Assemble the cake in an 8-inch diameter spring form cake pan (the same one you have used for baking your layer). Put the chocolate cake layer on the bottom of the pan and soak with the soaking mixture.
Pour the mousse over the cake in an even layer. Refrigerate for 4 hours or overnight.
Once the cake is set, remove it from the spring form pan and gently transfer onto a plate.
Dust generously with cocoa powder and enjoy!