Post-Workout Mass Gainer Shake

Method

1. Blend oats alone for 10 seconds to make oat flour.

2. Add milk, peanut butter, and honey. Blend to combine.

3. Add frozen banana, protein powder, creatine, and salt. Blend until completely smooth, about 60 seconds. Add more milk if too thick.

Equipment

• Blender Recommended: Ninja Professional Plus Blender

Chef Notes

• The most important thing: Blend the oats alone for 10 seconds first to make oat flour. This prevents chunky, gritty texture in a shake this thick.
• Commercial mass gainers are mostly maltodextrin (cheap sugar). This whole-food version provides better nutrition for the same calories — real carbs from oats and banana, real fat from peanut butter and milk.
• The 2:1 carb-to-protein ratio is optimal for post-workout recovery and muscle protein synthesis.
• Oats provide slow-digesting carbs; banana and honey provide fast carbs. Both are useful post-workout.
• At 720 calories, this is a serious shake for serious training. Drink within 2 hours of your workout.

Common Substitutions

Ingredient	Substitution	Notes
Frozen banana	1/2 avocado or frozen mango	Banana adds creaminess — avocado does the same without the banana flavor
Protein powder	2 tbsp peanut butter or Greek yogurt	Both add protein — peanut butter adds fat, yogurt adds tang
Almond milk	Oat milk, coconut milk, or regular milk	Oat is creamiest non-dairy; coconut adds tropical flavor
Honey	Maple syrup or 2 pitted dates	Dates blend smooth and add fiber
Fresh spinach	Frozen spinach or kale	Frozen is more convenient; kale is more bitter — use less

What You're Practicing

Building a calorie-dense shake from whole foods teaches you about caloric density — how to pack maximum nutrition into minimum volume. The same principle applies to trail mix, energy bars, and any situation where you need concentrated calories. Visit Techniques for more on calorie-dense nutrition.

Using oats as both a thickener and a carb source teaches you about dual-purpose ingredients — one ingredient serving multiple functions in a recipe.