Recipe for blondies

Someone asked for the Blondie recipe. It it taken from a book by Linda Collister.
Here it is:

175 g white chocolate
115 g butter (could probably use less, they felt a bit too greasy)
1 1/4 dl sugar
2 eggs
½ teaspoon vanilla
2 dl flour
½ teaspoon baking powder
150 g macadamia nuts
110 g dark or white chocolate (roughly chopped)

Melt the white chocolate, add the sugar. Add the slighty whipped egg and the vanilla.
Whip for about 1 minute.
Add flour and baking powder and blend. Then add 100 g nuts and the chocolate.
Put the mixture in a baking tin and sprinkle the rest of the nuts on top

Bake in an oven, 180 degrees (C) for about 20 minutes