Green Smoothie

Michael Eisenwasser

Print Recipe

A single-serve green smoothie built on spinach, firm-yellow banana, and pineapple, with all fruit and milk volumes pegged to Monash low-FODMAP serves.

Prep 5 min

Cook 1 min

Serves 1

Gluten-freeVegan-option

Ingredients

• 1.5 cups (about 75 g) fresh baby spinach, loosely packed
• 1 small firm-yellow banana (about 100 g peeled), still slightly green at the tips
• 1 cup (about 140 g) fresh or frozen pineapple chunks
• 1 cup (250 ml) lactose-free cow's milk or unsweetened almond milk
• 1/2 cup ice (skip if the pineapple is frozen)
• 1 teaspoon pure maple syrup (optional)
• 1/2 teaspoon fresh lime juice (optional)

Instructions

Blend

1. Add the milk to the blender first, then the spinach. Blend on high for 20 seconds to break down the leaves before any fruit goes in.
2. Add the banana, pineapple, ice, maple, and lime. Blend on high for 30 to 60 seconds, until smooth and uniformly green.
3. Pour into a glass and drink right away. The texture thins and the color darkens as it sits.

Tips & Substitutions

• Swap the spinach for kale if you tolerate it. Kale is more fibrous than spinach and can be harder on sensitive guts even at low-FODMAP serves. Start with 1/2 cup chopped and check the Monash app for the serve on your specific kale type (curly vs Tuscan, raw vs cooked). Strip the leaves off the stems and blend a few seconds longer.
• Add kiwi for extra tang. One gold kiwi or two green kiwis are a low-FODMAP serve and pair well with pineapple. Peel first, then add with the other fruit.
• Grate in fresh ginger. 1/2 teaspoon of peeled, grated fresh ginger is low-FODMAP and sharpens the flavor. Skip ginger powder blends that list garlic or onion.
• Pick a safe milk. Lactose-free cow, unsweetened almond (up to 1 cup / 250 ml), macadamia, hemp, or rice milk (up to 3/4 cup / 187 ml) all work. Canned light coconut milk is low at 1/2 cup. Oat milk is brand- and serve-dependent; use a Monash-certified carton or skip it. Avoid any milk with inulin, chicory root fiber, or added "prebiotic fiber."
• Mind the banana ripeness. Choose a firmer, still slightly green banana to keep the serve safely low. Fructans climb as bananas ripen, so heavily spotted bananas typically have a much smaller low-FODMAP serve — if yours is brown-spotted, start with 1/3 to 1/2 banana and check the Monash app for the current gram limit.
• Skip apple, pear, and mango. All three are common green-smoothie add-ins and all three are high-FODMAP even at small serves. Stick with the pineapple-and-banana base or add kiwi.

Why This Works

Leafy-green serve. Monash lists 75 g (about 1.5 cups) of English spinach and 75 g (about 1 cup) of chopped kale as low-FODMAP. Both greens are almost pure fiber and water, so volume drives taste and color more than FODMAP load.

Banana ripeness matters. Ripeness makes the biggest difference in this recipe. Unripe and just-ripe bananas are low-FODMAP at 100 g; once they spot and soften, the fructan content climbs and the serve drops to about 35 g. Buy slightly green bananas and use them within a day or two.

Pineapple over apple or mango. Pineapple is low-FODMAP at 140 g, while apple, pear, and mango are high even at small serves because of excess fructose and sorbitol. Pineapple adds tropical sweetness without pushing the serve over.

Milk matrix. Lactose is the FODMAP in regular cow's milk. Lactose-free dairy and most unsweetened nut milks stay low at 1 cup or more, so the milk volume doesn't need to shrink to fit the serve.

Sweetener rule. Pure maple syrup is low-FODMAP at 2 tablespoons. A teaspoon is usually enough with ripe pineapple and banana, and it keeps honey and agave (both high-fructose) out of the glass.

Storage

Blend and drink right away. Green smoothies oxidize fast and turn a dull army green within an hour. If you need to hold one, cap it in a sealed container with no air gap and refrigerate for up to 24 hours at 40°F (4°C) or below. Shake or re-blend before drinking. To prep ahead, freeze the spinach, banana slices, and pineapple in a zip bag, then add milk and ice at blend time.

Not sure about an ingredient? FODMAP Tracker includes a database of 1,000+ foods with FODMAP ratings to help you cook with confidence.