I don't know what acid the baking soda is working with, but it worked. The loaves rose nicely and the cookies turned out well, albeit a little flatter than usual. The anise wasn't very detectable---just a faint essence every now and then.
Here's what I used to make about 3½ dozen cookies. Changes are in italics and strikeout:
3/4 cup whole almonds
3 eggs
1 teaspoon vanilla extract
1/4 teaspoon almond extract
1/3 cup pea protein powder
1 teaspoon baking soda
1 tablespoon anise seed
Place nuts in a shallow pan and bake in a preheated 350F oven for 8 to 10 minutes, or until golden brown. Let cool. In a small bowl beat eggs, vanilla and almond extract with a wire whisk. In mixing bowl combine flour, sugar, baking soda, anise seed, and salt. Add egg mixture and mix until blended--about 1 minute. Cut nuts into halves or thirds and mix in. Divide dough in half. On a greased and floured baking sheet, pat out dough into two logs about 1/2 inch thick, 1½ inches wide, and 12 inches long, spacing them at least 2 inches apart. Bake in the middle of a preheated 300F oven for 50 minutes, or until golden brown. Transfer from the baking sheet to a rack. Let cool 5 minutes. Place on a cutting board. With a serrated knife slice diagonally at a 45-degree angle about 1/2 inch thick. Lay the slices flat on the baking sheet (they all fit if you place them bottom to bottom) and return to a 275F oven for 20 to 25 minutes or until toasted, turning them over once to dry the other side. Store in a tightly covered container.
I cheated and used dry roasted almonds instead of toasting my own.... Don't. You could tell they soaked up a little of the batter moisture and weren't fully crisp. Otherwise, they were just what I needed.
Conclusion: A great staple, but I'd like to figure out something to make them a little more hearty, perhaps with buckwheat flour, or rye.
Recipe: Biscotti di Prato from Biscotti by Lou Seibert Pappas