Combine vegan heavy cream and banana bread syrup. Froth using a Ninja milk frother or handheld frother until thick and creamy.
In a small cup, whisk matcha powder with hot water until smooth using a frother.
Pour oat milk into a glass, add brown sugar syrup, and stir.
Add ice to the glass.
Pour the matcha over the oat milk and ice.
Top with banana bread cold foam and enjoy immediately.