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Homemade weight gain smoothie in a mason jar on a white kitchen counter, photographed from above.

Peanut Butter Banana Weight Gain Smoothie

A thick, creamy, homemade peanut butter banana weight gain smoothie packed with protein, healthy fats, and oats; perfect for healthy bulking.
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Course: Drinks, Mocktails, Brunch
Cuisine: American, Healthy, High-Protein
Prep Time: 5 minutes
Cook Time: 0 minutes
Soaking oats: 3 minutes
Total Time: 8 minutes
Servings: 1 large smoothie
Calories: 850kcal
Cost: $3 per serving

Equipment

  • 1 High-powered blender
  • 1 Mason jar or large glass
  • Measuring Cups & Spoons

Ingredients

Main Base Ingredients

  • 1 large frozen banana
  • 1 cup whole milk
  • 3 tablespoon natural peanut butter
  • 0.5 cup rolled oats
  • 1 scoop vanilla protein powder

Healthy Fat Boosters

  • 1 tablespoon coconut oil melted
  • 0.25 medium ripe avocado
  • 2 tablespoon ground flaxseed

Flavor Enhancers

  • 2 tablespoon honey
  • 0.5 teaspoon vanilla extract
  • 0.25 teaspoon cinnamon
  • 4–5 ice cubes

Optional Power-Ups

  • 0.33 cup Greek yogurt
  • 1 tablespoon chia seeds
  • 1 tablespoon almond butter

Instructions

  • Add milk and oats to blender and soak for 3–4 minutes.
  • Add banana, peanut butter, protein powder, avocado to blender.
  • Blend starting low, increasing to high. Scrape sides if needed.
  • Add honey, vanilla, cinnamon. Blend again until smooth.
  • Add ice cubes, pulse to finish. Adjust thickness. Serve immediately.

Notes

Nutrition information is automatically calculated, so should only be used as an approximation.

Nutrition

Serving: 650g | Calories: 850kcal | Carbohydrates: 90g | Protein: 42g | Fat: 36g | Saturated Fat: 11g | Polyunsaturated Fat: 6g | Monounsaturated Fat: 12g | Cholesterol: 25mg | Sodium: 240mg | Potassium: 1250mg | Fiber: 11g | Sugar: 35g | Vitamin A: 350IU | Vitamin C: 10mg | Calcium: 390mg | Iron: 4.5mg