Match container size to the recipe: aim for a similar volume (often ~4–6 oz / 120–180 ml for standard ramekins).
Match heat rating to the method: use oven-safe glass/ceramic for baking; avoid broiler or microwave-only items.
Prepare for release: grease and dust with sugar/flour/cocoa if your recipe needs it (especially for custards and baked dips).
Adjust time: start checking 3–6 minutes earlier for muffin wells or thin disposable cups.
Confirm doneness: use visual cues (set edges, slight jiggle in custards) rather than ramekin-specific timing.