Almond Macaroons

My first (yes pathetic) attempt at making those beautiful almond macaroon cookies and cookie sandwiches, and it was a flop. They flattened and cracked.

What's the secret to getting beautiful macaroons like these:

Does anyone have a recipe that turns out well?

My Recent Baking Additions

Chocolate Chip Cherry Cake, for my work's holiday pot luck luncheon

Glitter Ball Cookies, for church small group party

Pumpkin spice muffins, just for fun