Cream together butter and sugar. Add egg, flour, vanilla and salt.
Drop by the teaspoonful onto a well buttered cookie sheet. Flatten cookies using a spatula dipped into cold water. Press sesame seeds generously into the top of cookies before baking.
Bake in a preheated 350°F degree oven until edges are lightly browned.
Remove from oven and cool immediately on wire racks.
Makes 2 - 2 1/2 dozen.
Submitted by: CM