Preheat & Prepare Pan: Preheat oven to 180ºC (356ºF). Line an 8-inch round baking pan with parchment paper. Alternatively, grease a non-stick pan with melted butter and dust with cocoa powder for smooth sides.
Mix Eggs & Sugar: In a large mixing bowl, beat sugar and eggs on low-medium speed for 30 seconds until combined.
1 cup granulated sugar,, 2 large eggs,
Incorporate Olive Oil & Liquids: With the mixer running on low speed, gradually drizzle in the olive oil, allowing it to emulsify (about 2 minutes). Pour in the milk and vanilla, then beat for 20 seconds until well incorporated.
3/4 cup extra virgin olive oil, 3/4 cup whole milk,, 1 tsp vanilla extract
Incorporate Dry Ingredients: Sift in flour, cocoa powder, baking powder, and baking soda. Sprinkle over the salt. Beat on slow-medium speed until just combined, ensuring no dry pockets remain. Scrape down the sides and fold through any remaining flour.
1 1/2 cups (225g) all-purpose flour,, 1/2 cup Dutch-process cocoa powder,, 1 1/2 tsp baking powder, 1/4 tsp baking soda, 1/2 tsp salt
Bake: Pour batter into the prepared tin and smooth the top. Bake for 40-45 minutes or until a toothpick inserted in the center comes out clean.
Cool: Let the cake cool in the pan for 10 minutes before transferring to a wire rack to cool completely.