Preheat your oven to 350℉. Grease an 8x8-inch square baking pan or 8-inch cake pan and line and line the bottom with parchment paper.
In a large bowl, whisk together the 4 large eggs at room temperature, 2 tablespoons milk of choice, and 2 teaspoons vanilla extract. Stir in the 2 cups almond flour, 1 cup granulated sugar, ½ cup cocoa powder, 1 ½ teaspoons baking powder, and ½ teaspoon fine salt. Fold in ¼ cup of the ½ cup semisweet chocolate chips
Scrape the batter into the prepared pan (it will be thick), and scatter the remaining chocolate chips over the top. Pace in the oven and bake for about 40 minutes, or until a tester inserted in the middle of the cake comes out clean. Transfer the cake to a wire rack to cool completely in the pan before turning out.
Notes
No need to rest the batter. I go on and on about this in most of my gluten-free baking recipes BUT almond flour does not perform the same as a whole grain gluten free flour - such as oat flour - and it does not need to hydrate before baking. So go ahead an pop it into the oven as soon as you assemble the batter. How nice!
Omit the chocolate chips. I love adding the half cup of chocolate chips to make this extra chocolatey. But you can totally leave them out if you wish.
Use whatever pan you prefer. I felt like having squares of cake the day I baked and photographed the cake, but I also love almond flour chocolate cake in a more traditional round cake shape. An 8-inch cake round will yield a thicker cake, while a 9-inch cake round will also work, though it will be a little bit thinner.
Make it a two-layer cake. Double the recipe to make two layers, then fill and frost them with your favorite frosting for an elegant presentation.