Heat oven to 350°F.
Combine sugar, butter, egg and vanilla in bowl. Beat at medium speed, scraping bowl often, until creamy. Add flour, baking powder and baking soda; beat at low speed until well mixed. Stir in toffee bits.
Shape dough into 1-inch balls. Roll in sugar. Place 2 inches apart onto ungreased cookie sheet. Flatten to 1 1/2-inch circles using bottom of glass. If glass sticks, dip glass in sugar.
Bake 9-11 minutes or until edges are just lightly browned. Do not over bake. Sprinkle with sugar while warm. Cool completely.
- English toffee bits and chips are available in the baking section of large supermarkets.
- Cookies may also be flattened with a fork in a criss-cross pattern.