Mix your ingredients and prepare your work area.
Suet is beef or mutton fat. You can purchase it at your grocery store by asking your meat counter. You can also buy it at stores that sell bird feeding products. Sometimes it comes with bird seed already mixed in. Ideally suet should be refrigerated.
Spread out a few sheets of wax paper on cookie sheets.
In the bowl, mix suet with bird seed, using your hands or a spoon.