Outline and Fill-in Windows and Doors
Hold bag at a 45? angle and touch tip to the surface. Squeeze at starting point so that icing sticks to surface. Now raise tip slightly, and as you squeeze, guide tip slightly above surface. To end outline, stop squeezing, touch tip to surface and pull tip away. After outline, fill in using a zigzag motion to fill area. Pat smooth using finger dipped in cornstarch.