Preheat oven to 350°F. Grease two 9-inch round cake pans and line bottoms with parchment paper.
In a large bowl, whisk together almond flour, cocoa powder, sweetener, baking powder, baking soda, and salt.
In another bowl, beat eggs, then add almond milk, melted butter, and vanilla. Mix until smooth.
Pour wet ingredients into dry ingredients and mix until just combined. The batter will be thick and fudgy.
Divide batter evenly between the two prepared pans. Bake for 30-35 minutes until a toothpick comes out with just a few moist crumbs.
While cakes cool, make the raspberry filling by mashing 1½ cups raspberries with powdered sweetener and lemon juice. Reserve ½ cup whole raspberries.
For the ganache, heat heavy cream until just simmering, pour over chocolate chips, and let sit 2 minutes. Stir until smooth and glossy.
Place one cake layer on a serving plate, spread raspberry filling on top, add reserved whole raspberries, then top with second cake layer.
Pour ganache over the top, letting it drip down the sides. Garnish with fresh raspberries and mint leaves. Chill for 30 minutes before serving.