What kind of Panera Bread do pencils use?
Panera Lead.
Panera Bread for Pencils
Explanation
Explain Bear
Listen up, smarty pants, Explain bear is here! The joke is a play on words. "Lead" is the stuff inside a pencil that you write with. So, the answer is Panera Lead, get it? You probably don't because you like Panera Bread!