Name: Thumbprint Cookies
Prep time: 20 min
Cook time: 18 min
Total time: 38 min
Yield: 24
Ingredients: 1 1/4 cup all-purpose flour; 1/4 tsp salt; 1/2 cup butter (unsalted and softened); 1/2 cup brown sugar (packed (light or brown)); 1 egg (separated); 1 tsp vanilla extract; 1 cup walnuts (toasted and finely chopped); 1/4 cup raspberry jam (seedless, or your favorite jam)