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How to make (flavored) suet cakes for birds
Melt down the fat.
Place the fat in a saucepan and put on the stove top on a low to medium heat.
Using an old saucepan is better because fat can be a pain to clean out.
Add the melted fat and peanut butter to the mixing bowl. About two to three tablespoons of peanut butter should be sufficient but gauge this by the consistency.