Place all the seeds in a spice grinder, coffee grinder, or blender.
Blend until the seeds are finely ground. (Alternately, crack and grind the seeds roughly in a mortar and pestle.)
Store in a sealed jar at room temperature for up to 2 months, or in the freezer for up to 6 months.
Makes about ½ cup.
Notes
Use 1 to 3 teaspoons of bread spice per loaf of bread, or more to taste. Start with the smaller amount the first time you use it and increase it to your liking in subsequent bakings. For strong-tasting dark breads like rye bread or whole grain bread, you can use up to 2 tablespoons per loaf.Add the spice mix along with the flour in the recipe.