Heat oven to 350°F. Grease 13x9x2-inch baking pan.
Beat butter and brown sugar in large bowl until well blended. Add eggs and vanilla; beat well.
Stir together flour, baking soda, cinnamon and salt. Gradually add to butter mixture, beating until blended. Set aside 1/4 cup toffee bits. Stir remaining toffee bits and oats into batter (batter will be stiff). Spread batter into prepared pan; sprinkle reserved 1/4 cup toffee bits over surface.
Bake 25 minutes or until wooden pick inserted in center comes out clean. Cool completely in pan on wire rack. Cut into bars.
*The % Daily Value tells you how much a nutrient in aserving of food contributes to a daily diet. 2,000 caloriesa day is used for general nutrition advice.