Chocolate sauce: 3/4 cup chocolate chopped, 1/3 cup heavy cream and 1/2 teaspoon cayenne powder
In a bowl, mix together flour and 1/2 tablespoon ground cinnamon. In a saucepan, heat water, butter, brown sugar, and salt until simmering. Add flour mixture and stir until a dough ball forms and pull away from the sauce pan. Set aside to cool.
In a mixing bowl, add dough and slowly mix to incorporate one egg at a time. Transfer dough to a piping bag with a star tip attached. On a greased baking sheet, slowly pipe the dough into discs using a spiral motion. Place is freezer for about 20 minutes.
Heat oil to 350 degrees F. Gently place two discs at a time and fry until golden brown. Remove from oil, and drain on paper towels.
Combine sugar and 1 tablespoon ground cinnamon in a bowl, and toss fried churros until lightly coated.
For the chocolate sauce: melt chocolate, add cayenne powder, and stir in heavy cream until well combined.
Roast marshmallows over flame, top on churros, and drizzle the chocolate sauce on top.