A cup of mashed bananas is 227 g — the King Arthur Baking figure, measured spooned and levelled. Very ripe bananas mashed to a pulp. It is used for banana bread, pancakes, smoothies and egg replacement. They are one of the heaviest ingredients on this page at 227 g per cup, which surprises people who think of a banana as a light fruit. The weight is the point: a cup of mashed banana is mostly water and sugar, and that is why it can replace both fat and eggs in a bake, and also why getting the amount wrong changes everything. This guide covers the weight of mashed bananas in every measure you will use — cups, tablespoons and teaspoons — how to measure it correctly, what to use instead when you run out, and how to store it. All weights on this page are approximate; verify with a kitchen scale when the recipe matters.
Mashed Bananas: weight and measurement table
The table below gives the weight of Mashed Bananas in every measure you will use, from a teaspoon up to 2 cups, all derived from the King Arthur Baking figure of 227 g per cup, spooned and levelled. Every figure is approximate — spooned and levelled is a technique, not a machine setting — so when the recipe matters, weigh the ingredient on a kitchen scale instead.
| Amount | Weight (approx.) |
|---|---|
| 1 teaspoon | 4.7 g |
| 1 tablespoon | 14.2 g |
| 1/4 cup (4 tbsp) | 56.8 g |
| 1/3 cup | 75.7 g |
| 1/2 cup (8 tbsp) | 113.5 g |
| 3/4 cup (12 tbsp) | 170.2 g |
| 1 cup (16 tbsp) | 227 g |
| 2 cups | 454 g |
| 100 g | 0.44 cups |
There are 3 teaspoons in a tablespoon and 16 tablespoons in a cup, so you can move between any of these measures by multiplying or dividing. If a recipe calls for 100 g and you only have measuring cups, that is about 0.44 cups. Keep the cups to grams converter open while you cook and you will never need to do the arithmetic in your head.
What is Mashed Bananas?
Very ripe bananas mashed to a pulp. Mashed Bananas is used for banana bread, pancakes, smoothies and egg replacement. The ingredient is a familiar one in most kitchens, but it is worth knowing what it actually is before you measure it, because the form it comes in decides how it behaves in a recipe. Mashed Bananas as sold is the form the weight on this page refers to: 227 g per cup, spooned and levelled, from King Arthur Baking. If you buy it in a different form — chopped, ground, toasted, sweetened or unsweetened — the weight per cup changes, sometimes by a lot, so weigh the ingredient in the form the recipe asks for, or weigh it before you change its form. That single habit, weighing before chopping, grinding or toasting, is what keeps the recipe consistent from one bake to the next.
How to measure Mashed Bananas
Spoon the mashed bananas lightly into the measuring cup or spoon, then level the top with the back of a knife. Do not scoop the measure straight from the bag or the jar, because scooping packs the ingredient down and adds weight with every spoonful. Do not press it down or shake the measure to settle it, because that packs it too. The spooned and levelled method is a technique, not a machine setting, so two people measuring the same ingredient can still differ by a few grams, which is why the figures on this page are approximate. When the recipe matters, weigh the mashed bananas on a kitchen scale instead: put the bowl on the scale, press tare, and add the mashed bananas until the scale reads the weight you need.
How to store Mashed Bananas
Use fresh; freeze overripe bananas for baking. That storage advice is worth following, because mashed bananas goes stale faster than most cooks expect, and stale mashed bananas will spoil a whole batch of baking. Keep it sealed, because air and moisture are what make it go stale, and keep it away from strong smells, because it absorbs odours from the cupboard. Check the ingredient before you use it: smell it, taste a little, and look at it. If it smells sharp, stale or off, or if it has changed colour or texture, replace it rather than risking a recipe on it. A small amount of fresh mashed bananas is always better than a large amount of stale mashed bananas, and the cost of replacing it is far less than the cost of a ruined bake.
What to use instead of Mashed Bananas
If you run out of mashed bananas, the closest swaps are Applesauce at 255 g per cup, Yogurt at 245 g per cup. Swap by weight, not by volume, because the cup weights differ, and a volume swap gives the wrong amount. Each substitute changes the flavour a little, so choose the one that suits the dish: a mild substitute for a delicate bake, and a stronger one where the flavour can carry it. Taste the finished dish before serving, because a substitute that works in a salad may not work in a cake, and the other way round.
Worked examples: Mashed Bananas in real recipes
1. A banana bread for the weekend
A banana bread loaf uses 16 tablespoons of mashed banana, about 227 g, folded into a batter of flour, sugar, butter and eggs. The banana is what keeps the loaf moist for days, and the weight is what decides whether it is moist or soggy: too much banana and the loaf sinks in the middle, too little and it bakes up dry and plain. Use very ripe bananas with mostly brown skins, mash them just before they go in, and weigh the pulp on a scale rather than counting the bananas, because their size varies so much.
2. Banana pancakes for a quick breakfast
A batch of banana pancakes for two uses 8 tablespoons of mashed banana, about 113.5 g, whisked with an egg and a little flour into a thick batter. The banana sweetens the pancakes and keeps them soft, so no extra sugar is needed, and the pancakes cook quickly because the batter is thin. Fry them over a medium heat and flip them once, when the edges look set, because banana pancakes burn faster than plain ones.
3. A banana smoothie for a busy morning
A breakfast smoothie uses 6 tablespoons of mashed banana, about 85.1 g, blended with milk, oats and a spoonful of peanut butter. The banana thickens the smoothie and sweetens it naturally, and freezing the bananas first makes the smoothie thick and cold without needing ice. Freeze overripe bananas in chunks, so they are always ready for a smoothie, and peel them before freezing, because a frozen banana is impossible to peel.
Why the weight of Mashed Bananas matters
Mashed bananas matter by weight because a banana is not a standard unit. One medium banana mashes to roughly half a cup, but bananas vary enormously in size, so a recipe that says two bananas can mean anything from 200 g to 300 g of pulp. That range is enough to make a banana bread moist or soggy, and the difference is entirely in the bananas. Weighing the mashed pulp is the habit that makes banana bread reliable: 227 g per cup is the King Arthur figure, and a loaf that needs a cup needs that weight, not a count of bananas. The ripeness matters too: very ripe bananas are sweeter and softer, and they mash to a smoother pulp that blends into the batter, while under-ripe bananas stay lumpy and taste starchy.
The King Arthur Baking figure, and how it was measured
The King Arthur Baking figure for mashed bananas is not disputed: 227 g per cup, spooned and levelled, is the accepted value, and other sources agree within a few grams. Small differences between brands and batches are normal, because natural ingredients vary, but the variation is small enough that the figure on this page is a reliable guide for everyday cooking. The figure on this page, 227 g per cup, was measured spooned and levelled, which is the standard method for this kind of ingredient. If you measure it differently — scooping instead of spooning, packing instead of levelling, or measuring after chopping — the weight changes, and the recipe changes with it. The source matters too: King Arthur Baking is the reference used throughout this site, because its figures are consistent and widely used in baking, and the USDA figures are used where King Arthur does not publish one. When two sources disagree, this site says so, and the figure given is the one judged most reliable for everyday cooking.
Common mistakes with Mashed Bananas
The most common mistake is counting bananas instead of weighing the pulp: two large bananas can weigh 50 g more than two small ones, and that extra moisture makes a loaf soggy. The second mistake is using bananas that are not ripe enough: yellow bananas with no brown spots are starchy and bland, while properly ripe bananas are mostly brown and smell sweet. The third mistake is mashing the bananas and leaving them standing, which turns them brown and watery; mash them just before they go into the batter. Finally, do not use mashed banana as an egg replacer in a recipe where the egg is the main structure, because banana adds moisture and sweetness but does not whip or set like a real egg.
Frequently asked questions
How many grams is 1 cup of mashed bananas?
One cup of mashed bananas weighs about 227 g, spooned and levelled, using the King Arthur Baking figure. That is for very ripe bananas mashed to a smooth pulp, and the weight varies slightly with ripeness, because riper bananas are softer and denser. The figure is approximate, so verify with a kitchen scale when the recipe matters.
How many bananas make 1 cup mashed?
About two medium bananas make a cup of mashed banana, but the count varies a lot with size, so it is a rough guide rather than a measurement. Two large bananas can give a third of a cup more than two small ones, which is enough to make a loaf soggy. Weigh the mashed pulp on a scale for baking.
Can mashed banana replace eggs in baking?
Yes, for moisture and binding: a quarter of a cup of mashed banana, about 57 g, replaces one egg in muffins, pancakes and quick breads. The banana adds sweetness and moisture, but it does not whip or set like a real egg, so do not use it in meringues, custards or angel food cake, where the egg is the main structure.
How ripe should bananas be for banana bread?
Very ripe, with mostly brown or black skins. Ripe bananas are sweeter, softer and mash to a smooth pulp, while yellow bananas are starchy and bland. If your bananas are not ripe enough, bake them in their skins in a hot oven for fifteen minutes until they turn black and soft, then let them cool and mash them.
Can I freeze bananas for baking?
Yes, and it is the best way to save overripe bananas. Peel them, freeze them whole or in chunks, and thaw them before use. Frozen bananas go soft and watery when they thaw, which is exactly right for mashing, and they keep for months in the freezer.