Cameras and Tests. The three webcams I compared were the embedded webcam on my HP EliteBook 8760w; the Logitech HD Webcam C615, an external unit you can buy for under $40; and the Logitech Broadcaster, an external unit that costs around $200 (Figure 1, below).
Special cake flour with a high starch-to-gluten ratio is made from fine-textured, soft, low-protein wheat. It is strongly bleached, and compared to all-purpose flour, cake flour tends to result in cakes with a lighter, less dense texture.
The recipe for the yellow butter cake calls for 10.5 oz cake flour, whereas the chocolate version calls for 8.25 oz cake flour and 2.25 oz cocoa. The other main change is to use water in place of milk as the milk proteins affect the flavor of the chocolate.