12 High-Calorie Smoothie Recipes for Weight Gain

By Pete Sullivan · Published July 31, 2026

• 950Calories/serving
• 5 minTotal time
• 1Servings
• 38gProtein
• 102gCarbs
• 40gFat

Smoothies are the easiest calories you will ever add, because liquid calories slide past the fullness that stops you from finishing another plate. Research comparing liquid and solid calories shows people barely compensate for what they drink. One good smoothie a day can close a 600 to 1,200-calorie gap, which for most people is the entire distance between staying skinny and gaining.

Every recipe below is one serving, five minutes, one blender. Calories are estimates from USDA food data; your brands will wobble the numbers slightly and it does not matter.

The base formula (build any smoothie from this)

Liquid base (300-450 cal): 2 cups whole milk, or oat milk for dairy-free. Fat engine (190-380 cal): 2-4 tbsp nut butter, or half an avocado, or 2 tbsp coconut oil. Carb load (100-300 cal): banana, oats, dates, mango, granola. Protein layer (100-160 cal): Greek yogurt, cottage cheese, or a whey scoop. Sweet finisher (60-130 cal): honey, maple syrup, chocolate syrup.

Pick one from each line and you have invented a 750 to 1,400-calorie shake. The twelve below are proven combinations.

The flagship: Peanut Butter Oat Classic (950 calories)

The recipe card on this page: whole milk, peanut butter, banana, oats, Greek yogurt, honey. Around 950 calories with 38 grams of protein, no powder needed. If you make one smoothie from this page forever, make this one.

The 600-800 tier (starter appetites)

1. Banana Honey Starter (620): 2 cups whole milk, 1 banana, 1 tbsp peanut butter, 1 tbsp honey, ice. The gentlest on-ramp on this list.

2. Strawberry Cheesecake (650): 1.5 cups whole milk, 3/4 cup cottage cheese, 1 cup frozen strawberries, 1 tbsp honey, splash of vanilla. Cottage cheese makes it thick and packs about 25 g of protein.

3. Mango Coconut (700): 1 cup coconut milk (canned, light) plus 1 cup oat milk, 1.5 cups frozen mango, 1 tbsp honey. Dairy-free and tastes like vacation.

4. Chocolate Avocado (720): 2 cups whole milk, half an avocado, 2 tbsp chocolate syrup, 1 banana. The avocado disappears entirely; the texture is pure milkshake.

5. Blueberry Almond (750): 2 cups whole milk, 1 cup frozen blueberries, 3 tbsp almond butter, 1 tbsp honey.

The 800-1000 tier (the daily workhorses)

6. Chocolate Peanut Butter Cup (880): 2 cups whole milk, 3 tbsp peanut butter, 2 tbsp chocolate syrup, 1 banana. The crowd favorite, and the one most likely to become a habit.

7. Vanilla Date Shake (900): 2 cups whole milk, 5 pitted Medjool dates, 1/2 cup Greek yogurt, vanilla, cinnamon. Dates are the most underrated gainer food in the grocery store: about 65 calories each.

8. Cookies and Cream (920): 2 cups whole milk, 1/2 cup vanilla Greek yogurt, 3 crushed chocolate sandwich cookies, 1 tbsp peanut butter. Yes, it counts. Calories that get drunk beat calories that get planned.

9. The Flagship (950): the recipe card above.

The 1000+ tier (hardgainer territory)

10. Oatmeal Raisin Monster (1,050): 2 cups whole milk, 3/4 cup oats, 2 tbsp peanut butter, 1/4 cup raisins, 1 tbsp honey, cinnamon. Practically a drinkable breakfast.

11. The Dairy-Free Heavyweight (1,100): 2 cups oat milk, 3 tbsp almond butter, 1 banana, 1/2 cup oats, 3 dates, 2 tbsp coconut oil. Proof that no-dairy does not mean low-calorie; more swaps like this in the lactose-free guide.

12. The 1200 Bomb (1,200): 2 cups whole milk, 4 tbsp peanut butter, 1 banana, 1/2 cup oats, 1/2 cup vanilla ice cream, 1 tbsp honey. Weekend special or serious hardgainer daily. If you want a full meal in a glass built around a protein scoop, that is the homemade mass gainer approach, and the dedicated 1,000 calorie smoothie guide goes deeper on the big ones.

Making it stick

One smoothie, one consistent slot, every day: mid-afternoon is the classic because it touches neither lunch nor dinner. Match the tier to the gap between what you eat now and your target from the calorie surplus calculator. Fill up too fast for even a smoothie? Split it into two glasses, hours apart, and read the small appetite playbook for the rest of the system.

Ingredients

• 2 cups whole milk
• 2 tablespoons peanut butter
• 1 large banana
• 1/2 cup rolled oats (dry)
• 1/2 cup full-fat Greek yogurt
• 1 tablespoon honey

Instructions

1. Add the milk, oats, and peanut butter to the blender first so the oats hydrate and blend smooth.
2. Add the banana, yogurt, and honey, then blend on high for 45 to 60 seconds until completely smooth.
3. Drink immediately, or refrigerate up to 24 hours and shake before drinking; it thickens as the oats absorb liquid.

Frequently asked questions

When should I drink a weight gain smoothie?

Between meals, most commonly mid-afternoon, so it adds to your daily total instead of replacing food you would have eaten anyway. Right after training and before bed are also popular slots. The one timing mistake is drinking it right before a meal you then cannot finish.

Can I make these smoothies ahead of time?

Yes, up to about 24 hours in the fridge in a sealed jar. Oat-based smoothies thicken overnight, so add a splash of milk and shake hard before drinking. For weekday speed, pre-bag the dry and frozen ingredients so mornings are dump, pour, and blend.

Do I need protein powder in a weight gain smoothie?

No. Milk, Greek yogurt, and peanut butter already carry meaningful protein; the flagship recipe reaches about 38 grams without any powder. A scoop is simply a convenient upgrade that adds roughly 120 calories and 24 grams of protein when you want more.

Sources

1. USDA FoodData Central: Calorie and macronutrient estimates for all smoothie ingredients are drawn from USDA food composition data.
2. DiMeglio DP, Mattes RD, Liquid versus solid carbohydrate: effects on food intake and body weight, Int J Obes (2000): Liquid calories produce weaker fullness compensation than solid food, the reason smoothies work so well for weight gain.