Preheat the oven to 350°F. Grease a 9-inch cake tin and line the bottom with a circle of parchment paper. Dust flour on the sides of the pan to prevent sticking and tap off any excess.
In a small mixing bowl, whisk together the almond flour, all-purpose flour, salt, and baking powder.
In the bowl of a stand mixer, or using a hand mixer, beat the sugar and butter together on medium-high speed until light in color and fluffy.
Add in one egg and beat on medium just until incorporated. Repeat with the other egg. Scrape down the sides and bottom of the bowl, then beat in the vanilla.
With the mixer on low speed, slowly add all the flour mixture. Just before the flour is totally incorporated, with the mixer still on low, drizzle in the milk. Stop the mixer when the batter is smooth and homogenous.
Transfer the batter to the prepared pan and smooth it out so it’s evenly distributed.
Bake for 28-30 minutes, or until the top is golden brown, the sides of the cake are pulling away from the tin, and the cake’s center springs back when pressed lightly.
Let the cake cool in its tin for about 5 minutes. Run a knife along the cake’s edges to loosen it from the sides of the tin. Gently flip the cake out onto a cooling rack and let cool completely. Using the wire rack, flip the cake onto your serving plate.