17-Pan casero (tipo baguette): Facilísimos y muy económicos!

Go ahead and make them: I make them in real time here. Cheap and efficient: 5 baguettes in no time! 1 kg 0000 flour 3 tbsp corn oil 1 tbsp softened butter (it gives the dough freshness) 25 g fresh yeast (or one 10 g sachet of dry yeast, it can be less too) with 1 teaspoon sugar and 1 tablespoon flour, well mixed while stirring. Salt 4 tsp salt (or to taste) Cornstarch for brushing (Optional) Water 600 ml approximately