No piping bag? Spoon the dough into a zip-top bag and snip a corner, or drop rustic spoonfuls — the ridges from a star tip give the classic look and extra crisp edges, but the flavor is the same.
Keep the oil at 350°F (175°C) between batches; a thermometer matters here. Too cool and the churros drink oil and go soggy; too hot and they brown before the centers set.
Dairy-free: a firm dairy-free butter substitute works in the dough. The egg stays, so this version is not vegan.
Churros are a same-hour food. If a few survive, re-crisp them in a 350°F (175°C) oven for 5 minutes and re-roll in cinnamon sugar.
This recipe is not yet test-made in my kitchen.