Tear bread into microwave safe bowl. Melt butter in microwave for 1 minute. Sprinkle brown sugar and sugar-cinnamon through bread. Pour melted butter over bread-sugar mix.
Heat milk in microwave on high 4 minutes. Beat eggs, vanilla and 1/2 cup sugar. Add hot milk slowly, beating as you add.
Pour evenly over bread-sugar mix, making sure to cover or soak all bread. Sprinkle sugar-cinnamon over top. Microwave on high for 10 minutes.