Grandmom's Famous Pinwheel Cookies

This is our absolute favorite Christmas cookie!
Sift together: 2 cups flour 1/2 tsp baking soda 1/2 tsp salt
Cream: 1/2 c butter adding 1 cup light brown sugar and beating until fluffy
Add: 1 unbeaten egg and 1 tsp vanilla
Blend in: dry ingredients
Roll out half dough on floured surface to 10" x 8" rectangle
Spread with half filling.
Roll up starting at 10" side. Wrap in waxed paper.
Repeat with second half.
Chill rolls two hours.
Slice and bake 400 degrees for 8-10 min. on lightly greased cookie sheet.
Watch carefully!

Chocolate filling: melt 1 c. semi-sweet chocolate bits; add 1 c. finely chopped walnuts

**edited on 12/10 by HM to include the egg and vanilla that was accidentally left out :)