: If you don't have a food processor, you can use these alternatives:
: Place dry bread pieces in a sealed plastic bag and crush them with a rolling pin or meat tenderizer until they break down. How To Make Bread Crumbs
Pulse in 5–10 second bursts until you reach the desired consistency. : If you don't have a food processor,
Place them in the processor, filling it no more than halfway to ensure an even grind. How To Make Bread Crumbs
: For ultra-fine crumbs, use a fine-toothed rasp grater. Types of Bread Crumbs Make Your Own Bread Crumbs - Taste Cooking