Biscuits Croquants Poivre et Noisette

Name: Biscuits Croquants Poivre et Noisette
Ingredients: 100 grams (3/4 cup) whole hazelnuts; 200 grams (1 2/3 cups) whole wheat flour (i used a mix of t65 and t110); 70 grams (2/3 cup) rolled spelt (or other old-fashioned rolled grains, such as oats); 120 grams (1/2 cup + 2 tablespoons) unrefined cane sugar; 1 teaspoon baking soda; A good pinch salt; 1/4 teaspoon freshly ground black pepper (substitute 1/4 teaspoon curry powder or 1/2 teaspoon good cinnamon); 130 grams (1/2 cup + 2 tablespoons) butter, chilled and finely diced; 2 tablespoons rose water, orange flower water, or just plain water, plus a little more as needed