With an electric mixer, combine butter, sugar and egg and mix until whipped and well combined.
Next, add flour to the wet mixture, mix w/ mixer with quick pulses until combined.
Remove from mixer and add almonds
Combine almonds with dough by hand and knead together until well combined and smooth.
Form the dough into 2, 2″ rolls and put in the refrigerator for 1 hr. (log style, and wrap with cellophane or wax paper)
Preheat oven to 200 Celsius, after the rolls are removed from the refrigerator.
Line cookie sheet with baking paper, unwrap your cookie rolls, and begin to slice slightly less then 1/4″ thick. Arrange slices on the baking sheet and bake for about 15 min, or until light golden brown.
note: can be stored in Christmas tins, lined with wax paper