Anabolic Banana Bread
A proper banana bread loaf, built to feed a lifter — ripe bananas, oat flour, a scoop of protein and a spoon of Greek yoghurt for the crumb. About 20 grams of protein and 290 calories a slice, and it lasts you the whole week. Sturdy, soft, honestly sweet. This is the loaf I keep on the counter, love, and I want you to have it.
Plate 01 / Finished
Every week there are three or four bananas on my counter going past the point where anyone wants to eat them — soft, freckled, a little sad-looking. My partner won’t touch them once they turn. I can’t bear to bin them. So years ago I started turning that little graveyard of fruit into a loaf, and somewhere along the way I taught it to carry real protein. Now those forgotten bananas are the best thing in my kitchen by Wednesday.
This is not a sad, dry, sawdust loaf. I want to be clear about that, because protein baking has a bad name and it earned most of it. The trick is the yoghurt and the egg whites keeping the crumb tender, the oat flour for body, and only enough protein powder to do the job — not so much it turns to chalk. What comes out is soft, properly banana-sweet, and it slices clean. A slice gives you around 20 grams of protein for 290 calories, which is a genuinely lovely number for something that eats like a treat.
I bake one loaf on a Sunday and it feeds me all week. A slice with coffee before the gym. A slice in my bag for the drive home. A slice warmed with a smear of peanut butter when I want something kind at the end of a long day. No counting agony, no shame, no wasted fruit. Just a sturdy, honest loaf that’s there when you need it. Make it once and I think you’ll keep those over-ripe bananas on purpose. I’ve got you.
01Who it’s for & when to eat it
One loaf, three jobs. The bread itself stays the same; what changes is when you reach for it and what you put alongside. Here’s how I steer it.
The honest sweet fix
One slice with your morning coffee or after training, when you want something that tastes like a treat but keeps the calories sensible. High protein, real food, and it scratches the sweet itch so you’re not raiding the cupboard later. No shame in it at all.
Easy clean calories
Two slices with a scoop of Greek yoghurt or a spread of peanut butter on top. Soft, calorie-dense, easy to get down when you’re struggling to eat enough. A painless way to add protein and carbs around training.
Steady morning fuel
A slice with a couple of whole eggs makes a balanced, satisfying breakfast — protein, slow carbs from the oats, and just enough sweetness to look forward to. Gentle on the stomach and it keeps you full to lunch.
Timing: this shines as a breakfast or a post-training slice — the bananas and oats give you carbs to refill on, and the protein does its quiet work. It also packs beautifully, which is the whole point of baking a loaf instead of a single serving.
02Ingredients
Makes 8 slices — one standard loaf, cut even. Want more? This doubles cleanly into two tins; keep the banana-to-flour ratio the same so the crumb stays soft.
Servings 8 · adjust on the live recipe card- Ripe bananas the freckled ones3 medium · 330 g
- Oat flour or blitzed oats160 g · 1⅓ cups
- Protein powder vanilla or unflavoured60 g · 2 scoops
- Eggs2 large
- Egg whites2 · 66 g
- Greek yoghurt 0% or 2%120 g · ½ cup
- Baking powder2 tsp · 8 g
- Cinnamon1 tsp
- Saltpinch
- Dark choc chips or walnuts optional40 g · ¼ cup
Swaps I actually use: no oat flour? Blitz rolled oats in a blender until fine — same thing, cheaper. Whey makes a lighter crumb; a casein or blend bakes denser and a touch moister, so add a splash of milk if your batter looks tight. No protein powder at all? See the variations and the questions below — you can still make a lovely loaf. And if the bananas aren’t quite ripe enough, roast them in their skins for ten minutes to coax the sweetness out.
03Step by step
Mash the bananas properly
Peel the bananas into a big bowl and mash them with a fork until almost smooth — a few small lumps are fine, they keep the loaf interesting. The riper they are, the easier this is and the sweeter your bread will be.
Magnus says: the browner the banana, the better the loaf. Don’t fear the freckles, love.
Beat in the eggs and yoghurt
Crack in the whole eggs, add the egg whites and the Greek yoghurt, and whisk it all into the mashed banana until smooth. This is the part that keeps the crumb soft, so take a moment and get it properly combined.
Stir the dry ingredients separately
In a second bowl, stir together the oat flour, protein powder, baking powder, cinnamon and the pinch of salt. Mixing the dry bits first stops the protein powder clumping when it hits the wet — a small step that saves you lumps.
Bring the two together — gently
Tip the dry into the wet and fold just until you no longer see flour. If you’re adding choc chips or walnuts, fold them through now. The batter should be thick and spoonable; if it’s stiff, loosen it with a splash of milk.
Magnus says: do not overmix. The second the flour disappears, you stop. Beating it gives you a tough, rubbery loaf.
Into a lined tin
Line a standard loaf tin (about 9×5 inch / 23×13 cm) with baking paper and scrape the batter in, levelling the top. A few extra banana slices or a scatter of chips on top is nice if you’ve got them.
175°C for 45–55 minutes, then wait
Bake at 175°C (350°F) for 45 to 55 minutes, until the top is golden and a skewer comes out clean or with a few moist crumbs. Then — and this is the hard part — let it cool fully in the tin before you slice it.
Magnus says: cool it completely before slicing. Cut it warm and protein loaves crumble. Patience gives you clean, sturdy slices.
04The spec sheet
Real numbers, calculated — not guessed. The loaf makes 8 slices of roughly 90 grams each. Here’s what one slice and a flat 100 grams actually give you. Your exact figures will shift a little with your protein brand and how big your bananas are.
| Nutrient | Per slice | Per 100g |
|---|---|---|
| Energy | 290 kcal | 322 kcal |
| Protein | 20.0 g | 22.2 g |
| Carbohydrate | 30.0 g | 33.3 g |
| — of which sugars | 12.0 g | 13.3 g |
| Fat | 7.0 g | 7.8 g |
| — of which saturates | 2.2 g | 2.4 g |
| Fibre | 4.0 g | 4.4 g |
| Sodium | ~0.28 g | ~0.31 g |
Moderate for a baked good — far gentler than shop banana bread, which often lands well north of 400. The yoghurt and egg whites are doing the heavy lifting here.
Strong for something sweet. A normal banana bread gives you almost none; this one carries real protein in every slice, which is the whole reason it earns a place in your week.
- Potassium~310 mg · 7% DV
- Magnesium~42 mg · 10% DV
- Vitamin B6~0.3 mg · 18% DV
- Phosphorus~180 mg · 26% DV
- Manganese~0.9 mg · 39% DV
- Calcium~70 mg · 5% DV
Macros are calculated from standard food-composition data and will shift a little with your exact ingredients and brands. Micronutrient figures are estimates against general adult Daily Values. Numbers are for guidance, not medical advice — see our Nutrition Disclaimer.
05Bulk / Cut / TRT variations
One loaf, three ways to lean it. The bread is the same; you adjust the slice and what sits on top. Macros below are per slice, with the additions counted in.
The lean slice
Make it with 0% yoghurt and skip the choc chips, then have one plain slice with your coffee. Maximum protein per calorie, real sweetness from the banana alone. This is the version I keep around when I’m tightening up before a shoot.
Build it up
Keep the choc chips or walnuts in, then top a slice with a heaped tablespoon of peanut butter and a spoon of Greek yoghurt. Soft, calorie-dense and easy to eat when your appetite’s lagging in a bulk.
Steady & balanced
One slice alongside two whole eggs for a full, balanced breakfast — protein, slow carbs and a little healthy fat. Satisfying, gentle on digestion, and nothing overshot for the day ahead.
06Meal prep & storage
This loaf was built to be made ahead. I bake it Sunday, cool it fully, slice the whole thing, and I’m set for the week — a real meal-prep bake, not a one-off. Here’s how to keep it good.
Store the cooled, sliced loaf in an airtight container in the fridge. It keeps soft and the flavour actually deepens by day two.
Freeze individual slices with baking paper between them so they don’t fuse. Pull one out the night before, or warm it straight from frozen.
Eat it cold from the fridge — it’s lovely that way — or warm a slice for 20 seconds in the microwave so it goes soft and the banana smell comes back.
For prep, I wrap two slices for the gym bag and leave the rest cut in the container. Because the macros are already counted, it slots into any day without fuss — which is exactly what you want from a bake that has to last you a whole week.
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07Common questions
My loaf came out dry — what went wrong? +
Almost always too much protein powder or too long in the oven. Protein powder soaks up moisture as it bakes, so the more you add the drier it gets — stick to the two scoops here. Pull the loaf the moment a skewer shows a few moist crumbs, not bone-dry, and don’t skip the yoghurt. A splash of milk in a tight batter helps too.
Can I make it without protein powder? +
You can, love. Swap the 60g of powder for another 60g of oat flour and keep the eggs, whites and yoghurt — they still bring real protein. You’ll land lower, around 13–14g per slice, but it’s a lovely soft banana bread and a fine breakfast. The powder is what pushes it up to 20g; everything else stands without it.
What can I use instead of oat flour? +
The cheapest swap is rolled oats blitzed fine in a blender — that is oat flour. Wholemeal or plain flour works too and gives a slightly lighter crumb. If you need it gluten-free, a 1:1 GF baking blend behaves well here. Whatever you use, keep the weight the same so the batter stays the right thickness.
How ripe do the bananas need to be? +
Properly ripe — soft, heavily freckled, almost too far gone to eat raw. That’s where the natural sweetness and the easy mash come from, so this is the recipe to save your sad counter bananas for. If yours are still firm and yellow, roast them in their skins at 175°C for about 10 minutes until the skins blacken, then let them cool and mash.
Can I freeze the baked loaf? +
Yes, and it freezes beautifully. Cool it fully, slice it, and freeze the slices with baking paper between them so they pull apart easily. They keep about three months. Thaw a slice overnight in the fridge, or warm it straight from frozen in the microwave for 30–40 seconds. Freezing in slices means you only ever defrost what you’ll eat.
This loaf lives inside a full week of meals.
A slice of this banana bread is one breakfast in my high-protein meal plans — seven days of food with the macros counted and the grocery list written. You pick the goal; I do the maths and feed you well.
See the meal plans →08Pairs well with
Magnus Olafsson
I’m Magnus — twenty years under the iron, from a cold gym in Stockholm to the classic-physique stage, and now mostly in my kitchen in a pink apron. I’ve cut for shows, bulked through winters, and I’ve been on TRT since I was thirty-five. I know what it takes to eat for the body you’re chasing, and I know it shouldn’t come with a side of shame.
Everything here is food I actually cook and macros I actually count. I don’t diagnose, I don’t promise, and I never make a number up. I just feed you well and tell you the truth.
Slim Diet Era shares recipes and general nutrition information. It is not medical or dietetic advice, and we do not provide guidance on obtaining or using any controlled substance. See our Medical Disclaimer and Nutrition Disclaimer.
