How to Make It
Preheat oven to 350°.
Combine 2/3 cup sugar, 1/2 cup blue cheese, and margarine in a bowl; beat at high speed of a mixer until smooth. Add milk, egg whites, and vanilla; beat well.
Combine 1 1/3 cups flour and baking powder. Add to cheese mixture, stirring just until moistened. Spread batter into a 9-inch square baking pan coated with cooking spray. Arrange pear slices in a single layer in 3 rows on top of batter, pressing pear slices gently into batter.
Combine 1/4 cup flour and 3 tablespoons sugar in a bowl; cut in remaining cheese with a pastry blender or 2 knives until mixture resembles coarse meal. Sprinkle over pears. Bake at 350° for 45 minutes or until browned. Serve warm.