Preheat oven to 375F
Mix flour, salt, baking powder, and baking soda in a bowl until combined and set aside.
Next, mix sourdough discard, heavy cream, maple syrup, vanilla, and egg until thoroughly combined.
Take cold butter from the fridge and cut it into cubes and add to the flour mixture.
Cut the cold butter into the flour mixture until it has a course texture.
Then combine the sourdough mixture with the flour and butter and mix it. By the end, I usually switch from the fork to my hands. But try to limit the amount of time you are working with the dough with your warm hands.
Next, line a sheet pan with parchment paper.
Use a 1/3 measuring cup to scoop out the dough and tap/shake it out onto the parchment paper.
Put in the oven for 20-25 minutes
Remove the biscuts from the oven and let them cool completly on a cooling rack before cutting into the shortcakes