Blending the oats into a flour first is what makes these soft and light rather than dense and chewy. Ripe banana and a little maple syrup sweeten them, and a 12-hole tin keeps each one a sensible size. They freeze well, too.

Each muffin has about 9g of protein and just under 150 calories. A quarter of its energy comes from protein, above the 20% that a food needs to be called "high protein" in the UK. Bakery muffins are usually much bigger and much higher in sugar.
The protein comes from four places: the protein powder, Greek yogurt, eggs and oats. Oats also provide beta-glucan, a soluble fibre. Eating 3g of oat beta-glucan a day, as part of a healthy diet, helps maintain normal blood cholesterol; each muffin gives you a small amount towards that.
Low in added sugar. Most of the sweetness comes from the ripe banana and the blueberries. The only added syrup is 30g of maple syrup across 12 muffins, which works out at under 2g of added sugar each. The NHS advises adults to have no more than 30g of free sugars a day.
No protein powder? Use 60g of ground almonds instead. Each muffin will have about 6g of protein and about 160 calories, so this version is no longer high in protein.
One or two make a sensible snack before or after training. Oats are naturally gluten-free but are often contaminated with wheat, so use oats labelled gluten-free if you need to. Contains eggs and milk. For a loaf version, try the healthy banana bread.