Combine the chickpea liquid, lemon juice and vanilla extract in a large bowl.
Using a handheld mixer, beat on high for about 2-3 minutes until fluffy.
Slowly add the powdered sugar and continue to beat on high for another 2-3 minutes. The mixture should be thick, with the same consistency of marshmallow fluff. Set aside.
Chocolate Oatmeal
Combine the rolled oats, almond milk, cocoa powder and maple syrup in a large pan and bring to a boil.
Cover and let simmer about 7-10 minutes until the oatmeal is cooked and creamy.
Stir in the vanilla extract and salt.
Divide the oatmeal between two serving bowls.
Toppings
Top each bowl with about 1/2 cup of marshmallow fluff. Using a kitchen blowtorch, caramelize the marshmallow fluff until golden brown. Top with chocolate chunks, melted chocolate or chocolate hazelnut butter.
Notes
Marshmallow fluff recipe adapted from Seitan Is My Motor. Browning the marshmallow fluff is optional, it will still taste great without doing it. You can soak the oats overnight to reduce cooking time. The nutritional information is just an estimate as it's hard to calculate the exact number of calories for the marshmallow fluff.