To maximize the toasty hazelnut flavor that makes these waffles special, make the batter no more than 2 hours in advance and cook the waffles just before sitting down to eat. To keep the first batches warm while you finish cooking the last of the batter, spread (rather than stacking) the waffles directly on a rack in a 200°F oven. Or, bring the waffle maker right to the table and cook them to order.
With a rotary grater, finely grind the hazelnuts. (Or process them with 2 Tbs. of the flour in a food processor until finely ground.) In a large bowl, whisk the ground hazelnuts, all-purpose and cake flours, baking powder, baking soda, and table salt until well combined. In another bowl, whisk the buttermilk, oil, eggs, sugar and vanilla until well combined. With a very open whisk or a rubber spatula, lightly stir the wet ingredients into the dry until just combined (small lumps in the batter are fine). Let the batter rest for at least 20 minutes (and up to 2 hours in the refrigerator). Cook the waffles according to your waffle iron manufacturer's instructions. In a Belgian waffle maker, the waffles have a tender interior; in a standard waffle maker, they'll be crisper.
nutrition information (per serving):
based on twelve servings, Calories
16, Fat Calories
140, Saturated Fat
8, Monounsaturated Fat
30, Polyunsaturated Fat
Photo: Scott Phillips