1-1/2 cups firmly packed brown sugar
1 cup mayonnaise
2 eggs
1 teaspoon vanilla
2-3/4 cups unsifted flour
1/2 teaspoon soda
1/4 teaspoon salt
1 cup chopped pecans
1 cup pecan halves, optional

In a large bowl, beat a the first four ingredients until smooth. Stir in the next four ingredients. Drop by level tablespoonfuls 2 inches apart on a greased cookie sheet. Top each with pecan half. Bake at 375 for 8-10 minutes, or until lightly browned. Immediately transfer cookies to wire racks. Makes about 4 dozen crispy cookies.