In a saucepan, whisk together the plant-based milk, melted dairy-free butter, and granulated sugar. Heat the mixture until just warm, about 98.6°F (37°C), similar to a warm bath.
Sprinkle the yeast evenly over the warm mixture and let it sit for 5-10 minutes to activate the yeast. Ensure the mixture is not too hot, or it will kill the yeast.
In a large bowl, mix the flour, cocoa powder, salt, and baking powder.
Pour the yeast mixture into the dry ingredients and mix with a wooden spoon until just combined.
Turn the dough out onto a floured surface and knead for about 5-7 minutes until smooth and elastic.
Place the dough in a greased bowl, cover with a towel or plastic wrap, and set in a warm place to rise for 1-2 hours, or until doubled in size.
Prepare the Filling:
In a small bowl, mix the softened dairy-free butter, light brown sugar, and ground cinnamon until well combined.
Stir in the dairy-free chocolate chips.
Assemble the Rolls:
Punch down the risen dough and roll it out on a floured surface into a large rectangle, about ¼-inch thick.
Spread the chocolatey cinnamon filling evenly over the dough.
Sprinkle the vegan mini marshmallows over the filling.
Starting from the long edge, tightly roll up the dough into a log.
Cut the log into 12 equal pieces and place them in a greased 9×13-inch baking dish, cut side up.
Cover the dish with a towel or plastic wrap and let the rolls rise again for about 30-45 minutes, or until puffy.
Bake the Rolls:
Preheat your oven to 350°F (175°C).
Bake the rolls for 25-30 minutes, or until golden brown.
Allow the rolls to cool slightly in the pan while you prepare the frosting.
Prepare the Whipped Frosting:
In a large bowl, beat the dairy-free butter until creamy.
Gradually add the powdered sugar, mixing until smooth.
Add the vanilla extract and plant-based milk (one tablespoon at a time) until the frosting reaches a spreadable consistency.
Serve:
Spread the creamy whipped frosting over the warm rolls.
Serve immediately and enjoy the gooey, chocolatey, marshmallow-filled goodness!
Vegan Mini Marshmallows: Ensure the marshmallows are vegan, as traditional marshmallows often contain gelatin.
Dough Rising: The dough needs to rise in a warm place to double in size. An oven with the light on or a slightly warm spot in the kitchen works well.
Serving: These rolls are best enjoyed warm and fresh, but can be reheated in the microwave for a gooey treat later.
