First things first, preheat the oven to 350 F. Line a rimmed cookie sheet with parchment paper and set aside.
In a medium mixing bowl, measure the flour, baking powder, and salt. Whisk to blend the dry ingredients and set aside.
In a large bowl beat the eggs on medium with an electric mixer until they are frothy.Continue mixing and add the sugar, butter, coffee, and vanilla. ¾ cup granulated sugar, ½ cup butter, 2 teaspoon instant coffee, 1 teaspoon vanilla extract, 4 eggs
Add the flour mixture and blend until all the flour is mixed in. Add the almonds, and fold into the dough.
3 cups flour, 1 teaspoon baking powder, 1 teaspoon salt, 1 cup almonds
Divide the dough into two portions. Form a log from each ball. Place on the parchment lined baking sheet and flatten down slightly.
Bake in the preheated oven for 30 - 35 minutes, or until slightly firm to the touch. Cook on cooling rack for 5 minutes.
Transfer the logs to a cutting board and using a serrated knife, slice diagonally in ¾" - 1" slices.
Arrange the mini biscotti on a rack, placed on a cookie sheet, and bake again for 5 minutes on each side. Cool and store in airtight containers.