01 - Melt butter in a small saucepan over medium heat. Stir continuously until it foams, turns golden brown, and emits a nutty aroma, about 3 to 4 minutes. Remove from heat and allow to cool slightly.
02 - In a blender, combine cooked beet, frozen mixed berries, banana, molasses, Greek or plant-based yogurt, almond milk, honey or maple syrup if using, cinnamon, vanilla, and sea salt. Add the cooled brown butter and blend on high speed until smooth and creamy.
03 - Taste the blend and adjust sweetness as desired. For a thinner texture, add more milk and blend again until desired consistency is reached.
04 - Pour the smoothie into chilled glasses and optionally garnish with fresh berries or a sprinkle of cinnamon. Serve immediately.