Mix together flour, starter, and water in a large bowl. I like to use my glass kitchen aid mixer bowl with the dough hook attachment. This makes for easy mixing in the beginning. First, I mix until all of the ingredients are incorporated. If the dough seems dry, it will moisten as it ferments. Cover the bowl and let sit for one hour.
Then, add 1 tsp of salt and do a series of stretches and folds with the dough until the salt is well incorporated. It’s probably about 10 stretches and folds. I do this right in the mixing bowl. Cover the bowl and let sit for 1 hour.
Do another series of stretches and folds, around 5 or 6, and finish with the dough in a taught ball shape. I do this right in the mixing bowl. Cover and let sit for 1 hour.
Remove the dough from the bowl with a dough scraper onto a lightly floured surface. After that, perform another series of 5 or 6 stretches and folds. Form the dough into a taught ball with the seams on the bottom of the ball.
Cut the dough ball in half with a dough scraper or knife. Shape each half into a long snake like baguette shape. I use a large baking sheet to bake my loafs on. So, I aim to make my baguettes about the length of the baking sheet. This makes two long baguettes.
Once the loaves have been shaped, place them on a parchment lined baking sheet. Cover with a towel and place in a warm spot to rise. I like to put them on the back of my oven while it's preheating.
Preheat the oven to 350F. Once the bread has been rising for about an hour. Make small slices in the top of the bread with a bread lame or knife. Then bake for 25 to 30 minutes, depending on how dark you want the crust.
After baking, remove the loaves from the oven and place them to cool on a cooling rack. Your simple same day sourdough baguettes are now read to enjoy!