2 eggs white large, at room temperature
1 tablespoon white vinegar
1 teaspoon vanilla extract
1/4 teaspoon salt
2/3 cup sugar
1 cup pecans finely chopped
1 cup semi-sweet chocolate chips mini or mint chocolate chips
Food color (optional)
Preheat oven to 275°. Grease baking sheets; set aside.
In a large mixer bowl at high speed, beat egg whites, vinegar, vanilla and salt until soft peaks form. Add sugar and, if desired, a few drops of food color;beat until very stiff and glossy and sugar is almost dissolved. Fold in pecans and chips. Drop by well-rounded teaspoonfuls about 1 inch apart on baking sheets.
Bake for 20 to 25 minutes or until set and dry to the touch. Cool cookies on wire racks.