Preheat oven to 350º

Beat butter and sugar together until light and fluffy (about 2 minutes)

Add salt and egg yolk and continue beating until well incorporated

Add flour, and beat until just mixed

Using pastry bag and large open star decorating tip (such as Wilton 1M), pipe wreathlets onto parchment-lined cookie sheet. Alternatively, shape into pecan-sized balls, and flatten into discs. These will not spread, but try to leave about an inch between each for air flow

If desired, sprinkle with coarse sugar

Bake in center of oven for about 15 minutes, until the edges are just turning golden. They may seem soft, but they’ll crisp up as they cool

Leave on cookie sheet to cool