Preheat oven to 325°F (170°C). Line two baking sheet pans with parchment paper or a baking mat.
In the large mixing bowl, sift almond flour, granulated white sugar, and salt. Set aside.
In a different mixing bowl, using a whisk or a hand mixer, whisk egg whites to soft peaks. This will take about 1-2 minutes.
Fold egg whites, into the dry ingredients using a rubber spatula. Add almond extract, Amaretti liquor, and red food coloring. Keep folding until all is well combined. The dough will be very sticky and look like paste.
Using a cookie scoop or a spoon, scoop dough into 1-inch balls.
Toss each ball in powdered sugar and coat well.
After that, place balls on the prepared baking sheet pan about 1 inch apart; cookies will expand during baking.
Bake cookies for 12-15 minutes or until lightly browned on the edges.
Take out of the oven and leave to cool for 5 minutes on the baking tray. After that, transfer cookies to a wire rack to cool completely.
Notes
All ingredients must be at room temperature.Space cookies well apart; they will spread in the oven.