Add almond milk, frozen banana, peanut butter, cocoa powder, Greek yogurt, honey, vanilla, and sea salt to a high-speed blender.
Blend on high until smooth and creamy, about 30 to 45 seconds.
Add ice and blend again until thick and frosty. For a thinner smoothie, splash in more almond milk; for a thicker one, add a few more ice cubes.
Taste and adjust sweetness. If using, blend in chia seeds or espresso powder for a nutrient boost or mocha flavor.
Pour into two glasses and serve immediately.
Notes
For a dairy-free version, swap Greek yogurt with a dairy-free yogurt or an extra 0.25 cup of almond milk plus 1.0 tbsp peanut butter. Use maple syrup instead of honey to make it vegan.