Who doesn't enjoy churros? One of the best snacks we grew up with in amusement parks, festivals, and carnivals, they're something we can't say no to. Now you can make them at home! Eat them plain or with a cup of hot chocolate to dip in.
In a 12-cup saucepan, heat oil (2 to 3 inches) over medium-high heat until thermometer inserted in oil reads 375 degrees.
In small bowl, mix 3 tablespoons of the sugar and the cinnamon; set aside. In medium bowl, stir Bisquick mix, hot water, and remaining 1 tablespoon sugar with spatula until dough forms.
Spoon dough into pastry bag fitted with 1/4-inch star tip. Pipe 5-inch strips of dough into hot oil. If necessary, cut dough with knife or scissors between each churro. Cook 2 to 3 minutes, turning frequently, until golden brown. Carefully remove from oil; drain on paper towels.
Immediately sprinkle churros generously with sugar-cinnamon mixture. Serve warm.