Why don't my muffins rise? Get tall, domed muffin tops

Bakery muffins have those tall, cracked domes; home ones often come out flat and pale. The dome is all about a hot oven and fresh raising agent — here's how to get it.

1. Old baking powder or bicarb

Raising agents lose their fizz over months in the cupboard. Flat, dense muffins are often just tired baking powder.

The fix: test it — a teaspoon of baking powder in hot water should fizz vigorously. Replace every 6–12 months.

2. You overmixed the batter

Muffin batter should be lumpy. Beating it smooth develops gluten and knocks out air, giving flat, tough, tunnelled muffins.

The fix: fold wet into dry until just combined — 10 seconds, lumps and all. Stop while it still looks rough.

3. The oven wasn't hot enough

The dome comes from a blast of high heat that shoots the batter up fast before it sets. A cool oven lets it spread flat instead.

The fix: start hot — many muffin recipes begin at 200–220°C for the first few minutes to force the dome, then you can drop the temperature. Preheat fully.

4. You underfilled the cases

For a dome that rises above the tin, the cases need to be full.

The fix: fill cases three-quarters to nearly full. Fewer, taller muffins beat a dozen flat ones.

The honest summary

Fresh baking powder, barely-mixed lumpy batter, a hot oven and full cases. That's the bakery dome, at home.