There's this part in the Nancy Drew movie where Nancy coerces a clerk with one of her housekeeper's blondies. (I'm the sort of girl who remembers great-looking food in movies.) Here's the blondie recipe I've been using for the last 15 years:
White Chocolate Chunk Blondies
3 T. prepared coffee
2 c. brown sugar
3/4 c. butter
2 c. flour
2 tsp. baking powder
1/2 tsp. salt
6 oz. white chocolate, chopped
Preheat oven to 350 degrees. Butter a 9x13 pan.
Heat coffee, sugar and butter over medium heat; stir until melted. Cool to room temperature.
Add eggs; whisk to combine. Add flour, baking powder and salt; stir to blend.
Sprinkle chopped white chocolate evenly over bottom of pan. Pour batter over chocolate. Bake about 35 minutes, until a toothpick comes out almost clean.
Notes: You can make an 8x8 square pan by using 2/3 of a recipe and decreasing the cooking time slightly. Buy the best white chocolate you can; some of it is too sweet. (You could also use brown chocolate...we don't because we have a non-brown-chocolate-eating family member.) I make the small amount of coffee by boiling 3 T. of water, tossing in a small spoonful of grounds, letting it steep a few minutes, and then strain into the pan.