To make the dough, mix the flour, starter, melted butter, water, honey, and maple syrup in a stand mixer with a dough whisk for 5 minutes.
Let the dough rest in the stand mixer for 15 minutes after mixing, then add your sea salt and mix for another 5 minutes.
Transfer the dough to a greased ceramic or glass bowl (not metal) and let ferment for about 6-12 hours. Dough will have doubled in size when it’s ready.
To make the cinnamon sugar mixture, place the brown sugar and cinnamon in a bowl and whisk with a fork until combined.
Take pieces of your dough and roll into a ball about 1-2 inches in diameter (it's not that serious - have fun with it), roll into your cinnamon sugar mixture, then place into a greased bundt pan and cover with a tea towel or plastic wrap.
Let the rolled dough proof in the bundt pan for at least 2 hours. You’ll know it’s ready for baking if the dough has puffed up and filled your bundt pan (about doubled in size). *If you’re doing the overnight version of this recipe, simply place the bundt pan in the fridge overnight. Remove from the fridge and let proof at room temperature for 2-4 hours prior to baking (takes longer since it’s cold).
After your final rise, make your salted caramel sauce. In a heavy bottomed saucepan, add the butter and heat on medium heat until it’s melted. Add maple syrup and stir, bringing to a boil.
Slowly stir in your cream and let simmer until it thickens stirring constantly (3-5 minutes).
Turn the heat off, add your sea salt, and stir until incorporated.
Pour caramel sauce over proofed dough.
Bake at 350F for about 30 minutes. *It took mine about 33-35 minutes. Use a wooden skewer to stick into the dough to see if it’s done (should come out clean).
Cool for only 10 minutes (no longer) in the bundt pan, then flip out onto a serving platter. Let cool for another 10-20 minutes, then serve.