Place butter in a 1-quart microwavable bowl. Microwave, uncovered, at 100% power (700 watts) for 20 to 30 seconds or until softened. With a wooden spoon, beat in brown sugar until creamy. Stir in oats, flour, baking powder and vanilla until blended. With floured fingers, press evenly in bottom of an ungreased 8 x 8 x 2-inch microwavable dish.
Microwave, uncovered, at 100% power for 3 to 4 minutes or until puffed and bubbly, rotating dish one-half turn after 2 minutes. Set aside on a wire rack.
In a 4-cup microwavable measuring cup or bowl, combine butterscotch chips, corn syrup and oil. Microwave, uncovered, at 100% power for 3 to 4 minutes or until chips are melted and mixture is blended, whisking every minute.
Sprinkle nuts on cookie base. Evenly pour butterscotch mixture over nuts to coat. Cool completely.
With a sharp knife, cut into bars. Cover and store in the refrigerator. Let stand at room temperature for 10 minutes before serving.
This Candy Bar Cookies recipe is from the More From Your Microwave Cookbook. Download this Cookbook today.
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