Pre heat oven to 325 degrees. Cream butter, sugar, butter-nut flavoring until fluffy. Sift flour and salt and add to creamed mixture, blending throughly. Add young pecans and mix well. Shape into 1 inch balls and place on baking pan. Bake at 325 for 20 minutes. Do NOT brown. Cool, then roll in powdered sugar. For chocolate cookies: Add 1/4 cup cocoa to the flour mixture and use vanilla instead of the butter-nut flavoring.