Tulo

Protein Smoothie Recipe

A thick banana peanut butter protein smoothie in a tall glass, topped with banana slices and a drizzle of peanut butter, with a metal straw and scattered peanuts on the counter.

Blending the liquid and protein powder together first breaks up clumps before the banana and ice go in, so the smoothie comes out smooth instead of gritty, and the peanut butter adds enough fat to keep it thick and satisfying rather than watery.

Prep
5 min
Cook
0 min
Total
5 min
Servings
2

Ingredients

Servings2
  • 1 cup milk (dairy or unsweetened plant milk)
  • 1 scoop (about 30g) vanilla protein powder
  • 1 medium banana, frozen
  • 2 tbsp peanut butter
  • 1/2 cup ice cubes

Nutrition per serving

Calories
364
Protein
25g
Carbs
27g
Fat
19g

Based on the recipe as written, one serving. Recalculates if you swap an ingredient above. An estimate only, exact values depend on the specific ingredients used.

Need different units or a different yield? Try our Conversion Calculator →

Instructions

  1. 1Add the milk and protein powder to the blender first and blend on low for 10-15 seconds until no clumps remain.
  2. 2Add the frozen banana and peanut butter.
  3. 3Add the ice cubes.
  4. 4Blend on high for 30-45 seconds, stopping to scrape down the sides if needed, until completely smooth and thick.
  5. 5Pour into glasses and drink right away.

Tips & variations

  • Freeze ripe bananas in chunks ahead of time; a frozen banana gives the smoothie a thick, milkshake-like body without watering it down the way regular ice does.
  • Swap the peanut butter for almond butter or sunflower seed butter for a nut-free option.
  • Add a handful of raw spinach for extra fiber and micronutrients; it disappears into the color once blended with the banana and peanut butter.
  • For a higher-protein version, swap half the milk for plain Greek yogurt.
  • If the blender struggles, add liquid a splash at a time rather than dumping in more ice; too much ice is the most common reason smoothies stall out thin and slushy instead of thick.

Storage & reheating

Protein smoothies are best drunk immediately, since the texture separates and thins as it sits. If needed, store in an airtight jar in the refrigerator for up to 24 hours and shake or re-blend before drinking. For longer storage, pour into popsicle molds or freeze in an ice cube tray, then blend the frozen cubes with a splash of milk when ready to serve.

Tips from the Tulo kitchen

  • Chilling the glass in the freezer for a few minutes beforehand keeps the smoothie colder for longer without needing extra ice.
  • Whey protein powder blends smoother than most plant-based blends; if using a plant-based powder and it still turns out gritty, let the blended mixture sit for a minute before drinking so it can fully hydrate.

FAQ

Can I use water instead of milk?

Yes, but the smoothie will be noticeably thinner and lower in protein and calories. Using milk, or a splash of Greek yogurt with water, keeps the texture creamy.

Why is my protein smoothie gritty or chalky?

This usually happens when protein powder is added on top of ice or frozen fruit instead of into plain liquid first. Blend the powder into the milk alone for a few seconds before adding anything frozen.

What's the best protein powder for smoothies?

Whey protein isolate or concentrate blends the smoothest. Plant-based blends (pea, rice, hemp) work fine but can turn slightly gritty or chalky if the smoothie isn't blended long enough.

Can I add vegetables to a protein smoothie?

Yes, raw spinach or baby kale blend in without changing the flavor much, since the banana and peanut butter dominate. Start with a small handful and increase once you're used to the texture.