Preheat oven to 350°F (175°C). Grease a 9-inch round cake pan and line the bottom with parchment. In a large bowl, whisk together the flour, cocoa powder, sugar, baking soda, baking powder, and salt until no lumps remain.

In another bowl, whisk the eggs, olive oil, milk, and vanilla until smooth. Slowly whisk in the hot coffee.

Pour the wet ingredients into the dry and stir just until no flour streaks show, about 30 seconds. Do not overmix.

Pour the batter into the pan and bake for 30 to 35 minutes, until a toothpick inserted in the center comes out with a few moist crumbs.

Cool in the pan for 10 minutes, then turn out onto a wire rack, peel off the parchment, and flip right-side up. Cool completely, dust with powdered sugar, and slice.