What makes a smoothie good for weight gain?

A weight gain smoothie combines a calorie-rich liquid like whole milk, whole fruit or vegetables, a protein source such as Greek yogurt or protein powder, and a calorie booster like nut butter, oats or avocado. That mix delivers 500 to 1,000 calories with real nutrition rather than empty sugar.

How many calories should a weight gain smoothie have?

Aim for 500 to 1,000 calories depending on how much of your daily surplus you want it to cover. One 700-calorie smoothie on top of normal meals often supplies the entire 300 to 500 calorie daily surplus needed for steady gain.

Are smoothies or shakes better for gaining weight?

Both work. Smoothies lean on whole fruit and vegetables for extra vitamins and fiber, while protein shakes focus on protein and convenience. Choose whichever you'll actually drink every day; consistency matters more than the exact recipe.

When is the best time to drink a weight gain smoothie?

Between meals — mid-morning, mid-afternoon, or after a workout — so it adds to your daily total rather than blunting your appetite for solid food. Avoid drinking one right before a meal you want to finish.

Can I make a weight gain smoothie without dairy?

Yes. Use soy or coconut milk as the base, plant-based protein powder, and nut butter, oats, dates or avocado as calorie boosters. The dairy-free recipes above deliver 600 or more calories each.

Weight Gain Smoothie Recipes

By Mustafa Bilgic · Updated June 2026 · Reviewed against guidance from NIH/NIDDK, the Mayo Clinic, the Academy of Nutrition and Dietetics, USDA, and the CDC.

Affiliate disclosure (FTC): WeightGain.us is reader-supported. Some links in this guide may be affiliate links, meaning we could earn a small commission if you buy through them — at no extra cost to you. This never changes our recommendations, which are based on published evidence.

Weight gain smoothies turn fruit, oats, yogurt and nut butter into a 500–1,000 calorie meal you can sip when you can't face another plate of food. Unlike a plain protein shake, a smoothie leans on whole fruit and vegetables for vitamins and fiber alongside the calories. Below are eight blender-friendly recipes built around real food, plus the formula so you can design your own to a calorie target.

Key takeaways

A weight gain smoothie blends a calorie-rich liquid, fruit or vegetables, protein, and a calorie booster.
Aim for 500–1,000 calories and 20–30 g protein per smoothie.
Drink it between meals so it adds calories instead of replacing dinner.
Frozen fruit makes it thick and cold without watering it down with ice.

Why smoothies help you gain weight

Putting on weight means holding a calorie surplus for weeks — eating more than you burn. For people with a small appetite, drinking calories is far easier than chewing them, because liquids empty from the stomach faster and trigger less fullness than a solid meal. A smoothie capitalizes on that while still delivering whole-food nutrition: real banana, berries, oats and yogurt bring potassium, antioxidants, fiber and protein along for the ride. The Mayo Clinic and the Academy of Nutrition and Dietetics both list blended drinks among the practical ways to add calories when meals alone aren't enough.

One well-built smoothie a day on top of normal meals often covers the entire 300–500 calorie daily surplus most people need — see the math in our how many calories to gain weight guide. Where a smoothie differs from a pure weight gain shake is the emphasis on whole fruit and vegetables, which makes it a great choice when you also want the micronutrients of produce you might otherwise skip.

The high-calorie smoothie formula

Every calorie-dense smoothie follows the same four-part template. Pick from each row, blend, and you have a balanced drink:

Component	Job	Examples
Liquid base	Calories + blend	Whole milk, soy milk, 100% juice, kefir
Fruit/veg	Vitamins, fiber, sweetness	Banana, mango, berries, avocado, spinach
Protein	Builds muscle	Greek yogurt, protein powder, milk powder
Calorie booster	Energy density	Nut butter, oats, dates, honey, oil, avocado

Use the USDA FoodData Central database to dial in exact calories. Anchors: a cup of whole milk is about 150 calories, a medium banana about 105, two tablespoons of peanut butter about 190, half a cup of oats about 150, and a tablespoon of honey about 64.

8 weight gain smoothie recipes

Calorie figures are approximate and depend on your portions and brands. All take under five minutes in a basic blender.

~720 kcal · ~30 g protein

1. Banana Berry Power

1.5 cups whole milk
1 banana + 1 cup frozen mixed berries
3/4 cup full-fat Greek yogurt
2 tbsp ground flaxseed + 1 tbsp honey

~900 kcal · ~35 g protein

2. Mango Oat Creamsicle

1.5 cups whole milk
1 cup frozen mango + 1/2 cup oats
1 scoop vanilla protein
2 tbsp almond butter

~850 kcal · ~28 g protein

3. Green Avocado Glow

1.5 cups whole milk
1/2 avocado + 1 banana + 1 handful spinach
1 scoop vanilla protein
1 tbsp olive or flax oil

~780 kcal · ~30 g protein

4. Peanut Butter Cup

1.5 cups whole milk
1 banana + 2 tbsp peanut butter
1 tbsp cocoa + 1 scoop chocolate protein

~620 kcal · ~25 g protein

5. Tropical Coconut (dairy-free)

2 cups soy or coconut milk
1 cup pineapple + 1/2 banana
2 tbsp shredded coconut + 1 scoop plant protein

~1,000 kcal · ~38 g protein

6. Hardgainer Berry Oat (highest calorie)

2 cups whole milk
1 cup berries + 1 banana + 1/2 cup oats
3 tbsp peanut butter + 1 scoop protein
1/4 cup raisins

~560 kcal · ~22 g protein

7. Cherry Almond Recovery

1.5 cups whole milk
1 cup frozen cherries
3/4 cup Greek yogurt + 2 tbsp almond butter

~700 kcal · ~26 g protein

8. Date & Cocoa Mocha

1 cup whole milk + 1/2 cup cold coffee
4 pitted dates + 1/2 banana
1 scoop chocolate protein + 1 tbsp almond butter

Tips to drink more & digest better

Sip slowly over 20–30 minutes rather than chugging — far easier on a small appetite.
Drink it between meals so it adds calories instead of replacing dinner.
Use frozen fruit for a thick, cold smoothie without watering it down with ice.
Add oats or nut butter last if it's too thin; add more milk if it's too thick to finish.
Batch and refrigerate — blend a double portion and keep half in a sealed bottle.

Mistakes to avoid

All fruit, no fat or protein. A pure-fruit smoothie spikes blood sugar without building muscle. Follow the four-part formula.
Replacing meals. Smoothies should add calories on top of meals, not stand in for them.
Too much added sugar. Let fruit and dates do most of the sweetening; a little honey is plenty.
Forgetting protein. Aim for 20–30 grams per smoothie so the surplus builds muscle, especially if you lift — see our bulking guide.

The bottom line

A daily smoothie is one of the highest-leverage habits for gaining weight, because you can sip hundreds of calories long after a meal would have defeated you. Follow the four-part formula, lean on whole fruit and nut butter for density, and a single glass can cover most of your daily surplus while still delivering real nutrition.

Informational, not medical advice. This article is general educational information, not a substitute for professional medical or nutrition advice. If you are underweight, have lost weight unintentionally, have a food allergy or any health condition, consult a doctor or registered dietitian before changing your diet. Operator: Mustafa Bilgic.

Frequently asked questions

What makes a smoothie good for weight gain?: A weight gain smoothie combines a calorie-rich liquid like whole milk, whole fruit or vegetables, a protein source such as Greek yogurt or protein powder, and a calorie booster like nut butter, oats or avocado. That mix delivers 500 to 1,000 calories with real nutrition rather than empty sugar.
How many calories should a weight gain smoothie have?: Aim for 500 to 1,000 calories depending on how much of your daily surplus you want it to cover. One 700-calorie smoothie on top of normal meals often supplies the entire 300 to 500 calorie daily surplus needed for steady gain.
Are smoothies or shakes better for gaining weight?: Both work. Smoothies lean on whole fruit and vegetables for extra vitamins and fiber, while protein shakes focus on protein and convenience. Choose whichever you'll actually drink every day; consistency matters more than the exact recipe.
When is the best time to drink a weight gain smoothie?: Between meals — mid-morning, mid-afternoon, or after a workout — so it adds to your daily total rather than blunting your appetite for solid food. Avoid drinking one right before a meal you want to finish.
Can I make a weight gain smoothie without dairy?: Yes. Use soy or coconut milk as the base, plant-based protein powder, and nut butter, oats, dates or avocado as calorie boosters. The dairy-free recipes above deliver 600 or more calories each.

Keep reading

References

Sources: USDA FoodData Central · Mayo Clinic — Healthy weight gain · Academy of Nutrition and Dietetics · NIH/NIDDK — Weight Management · ISSN — Protein & Exercise Position Stand.