Preheat oven to 350℉ and start with your cupcake tin. Line with cupcake or muffin cups and set aside.
Measure milk in a liquid measuring cup and set aside.
In a medium mixing bowl, combine flour, hazelnut flour, salt and baking powder. Set aside.
Measure the olive oil in a liquid measuring cup. In a large mixing bowl, whisk the eggs and both sugars until smooth and fluffy. While whisking, drizzle in the olive oil. Add vanilla extract and whisk until just combined.
Add half of the dry ingredients to the wet ingredients. Mix until just incorporated then add the milk and, again, mix until just incorporated. Finally, add the last half of the dry ingredients and mix until just combined. Do not overmix.
Use a muffin or cookie scoop to put one level scoop of cupcake batter in each cupcake liner.
Bake for 25-28 minutes until cupcakes start to turn golden brown at the edges and a toothpick comes out with a few moist crumbs. Transfer to a wire rack to cool for 5-10 minutes before removing cupcakes from pan to cool completely.