INGREDIENTS
1 1/4 cups
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)