How can I test my oven for hot spots and bake more evenly?

How can I test my oven for hot spots and bake more evenly?

We’ve all been there. You followed the recipe to the letter. Your dough was perfect, the temperature was set precisely, and you even preheated the oven for a full 20 minutes. Yet, when the timer dings, you pull out a tray of muffins where half have exploded into glorious, golden domes and the other half look like sad, pale little hills. Or worse, a sheet of cookies with a clear dividing line between “perfectly chewy” and “carbonized hockey puck.”