Combine ½ cup of white sugar with the cinnamon on a plate. Set aside and line another plate with paper towels.
In a small saucepan over medium heat, whisk together the water, 1 ½ tablespoons sugar, salt and 2 tablespoons vegetable oil. Bring the mixture to a boil then remove it from the heat. Stir in the flour, mixing until it forms a smooth ball.
Heat 3 to 4 inches of vegetable oil in a large, heavy-bottomed pot set over medium-high heat until it reaches 375ºF.
Transfer the dough to a cloth pastry bag fitted with a large star tip and pipe the dough over the pot of oil to a length of about 4 inches, then using scissors or a sharp knife, cut it so it releases into the oil. Pipe two to three churros into the oil at a time, frying them until they're golden brown and cooked through. Transfer the churros to the paper towel-lined plate to drain for 2 minutes. Then roll them in the cinnamon-sugar mixture. Repeat the frying and coating process with the remaining dough.
Serve the churros with the warm chocolate sauce (recipe below) and the dulce de leche which can be bought from the store.
To make the chocolate sauce:
Place the chopped chocolate in a small bowl.
Warm the heavy cream in small saucepan and pour the heavy cream over the chopped chocolate. Let it sit for 1 minute then stir to combine. Transfer the chocolate sauce to a small serving bowl and serve with the warm churros.
To prep the Dulce de Leche
Remove the store bought dulce de leche from the can and transfer to a small serving bowl. Serve with the warm churros and pretend you made it yourself :)
Notes
If you're short on time or making these on a whim, they can be served with ice cream or chocolate syrup as well. Even whipped cream - whatever you have on hand!