An almond biscuit, also known as an amaretti cookie, is a sweet treat that is made from ground almonds, sugar, and egg whites.
Okay, so imagine you have some very tiny little seeds called almonds. You mash them up into a powder, kind of like how you would crush up some crackers to make a crust for a pie. Then, you add some sweet sugar and some squishy egg whites to the almond powder. You mix everything together until it's all gooey and sticky.
This gooey mixture is then scooped onto a baking sheet and baked in an oven until they turn golden brown on the outside. They look like little round balls that are slightly flattened on the top. When they're all done baking, they're soft and chewy on the inside, but crispy and crunchy on the outside.
So, a fancy name for these little treats is called almond biscuits or amaretti cookies, but they're really just little balls of ground-up almonds, sugar, and egg whites that are baked in the oven until golden brown. And they taste really yummy!