Step 1: Prepare the Hazelnuts
Toast the Hazelnuts: Preheat your oven to 350°F (175°C). Spread the hazelnuts on a baking sheet and roast for about 10-12 minutes, or until they’re golden and fragrant. Keep an eye on them to avoid burning.
Process the Hazelnuts: Once toasted, allow the hazelnuts to cool slightly. Place them in a food processor and pulse until finely ground. You can also chop them by hand if you prefer a chunkier texture.
Step 2: Mix the Batter
Combine Sugar and Eggs: In a mixing bowl, whisk together the sugar and eggs until light and frothy.
Add Wet Ingredients: Slowly drizzle in the oil or melted butter and vanilla extract, continuing to whisk until well combined.
Incorporate Dry Ingredients: Add the ground hazelnuts, baking powder, and salt to the egg mixture. Mix until just combined; do not overmix to keep the cake light.
Step 3: Bake the Cake
Prepare the Pan: Grease and flour a 9-inch round cake pan to prevent sticking.
Pour the Batter: Transfer the batter into the prepared cake pan, smoothing the top with a spatula.
Bake: Place in the preheated oven and bake for 25-30 minutes, or until a toothpick inserted into the center comes out clean.
Cool: Once done, let the cake cool in the pan for about 10 minutes, then transfer it to a wire rack to cool completely.
Step 4: Serve
Garnish and Enjoy: Dust the cooled cake with powdered sugar, and serve it with whipped cream or mascarpone cheese if desired. Enjoy it as a lovely dessert after dinner or during a cozy afternoon coffee break.