Make the Banana Bread Syrup:In a saucepan, mash your overripe banana and add the brown sugar, maple syrup, and cinnamon. Cook over medium heat for about 5 minutes, stirring occasionally. Once sugar dissolves, add the water and bring to a gentle boil. Reduce heat and let simmer 10–20 minutes, until thickened. Stir in vanilla and salt. Strain through a fine mesh sieve and store in a jar.
Caramelize Bananas (Optional):In a small pan over medium heat, melt butter. Add diced banana and maple syrup. Cook until golden and sticky (about 3–5 minutes).
Make Cold Foam (Optional):Combine milk, cream, and syrup in a small cup. Froth until thick and fluffy using your tool of choice.
Assemble the Iced Latte:Fill a glass with ice. Add whole milk, 1–2 tbsp syrup, and 2 shots espresso. Stir to combine. Top with cold foam and caramelized bananas if using.
Make it Hot:Skip the ice. Steam your milk, stir in syrup, pour espresso over top, and top with foam (optional).
Make it Hot:Skip the ice. Steam your milk, stir in syrup, pour espresso over top, and top with foam (optional).