Boterkoek Dutch Buttercake

Yield:	10 Servings
Categories:	Cakes, Ethnic, Desserts

2	c	Flour
1	ts	Baking powder
2/3	c	Sugar
8	oz	Unsalted butter; Med-hard consistency
1	ts	Almond extract
1	pn	Salt
1		Egg yolk
1/2		Egg white
		Slivered almonds; optional