Always have fresh almond paste on hand with easy to make almond paste in just minutes with a food processor and 5 ingredients.
In a food processor, process the almonds and sugar until powdery, about 1 minute. Add the egg whites, butter and extract. Process until the mixture forms a ball.
Wrap in almond paste in plastic wrap and refrigerate. The paste will last in a refrigerator for at least a month and forever if frozen. (I'm not really sure if it lasts forever, but it lasts a long time).