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Export 1 ingredients for grocery delivery
Step 1
Preheat oven to 170° F, or lowest setting if above 170°F
Step 2
Spread used coffee grounds on foil lined baking sheet. Bake for 2 to 3 hours until grounds are dry and slightly crunchy.
Step 3
Transfer to coffee grinder, and process to a fine powder.
Step 4
Store in airtight container.
Step 5
Yield: Depends on the amount of coffee grounds you start with.