In a small bowl, whisk the yeast with 1 cup flour. In a small saucepan, heat the buttermilk with ¼ cup/60 grams water over medium-low heat, stirring often, until lukewarm (about 100 degrees), about 5 minutes. *Careful not to heat too fast!

Pour the buttermilk into the flour and whisk until smooth. Cover with plastic wrap and let sit for 1 hour to create a pre-ferment.

In a medium bowl, whisk the butter, honey, syrup and salt until smooth. Keep at room temperature if using within a few hours. Otherwise, refrigerate in an airtight container for up to 1 week. Soften the butter and whisk it again before serving.

Combine the butter, honey, syrup, soy sauce and salt in a small saucepan. Heat over medium-low, whisking often, until the butter melts completely. While whisking, add 1 ½ tablespoons water. Keep whisking until emulsified, then reduce the heat to the lowest setting to keep warm.

Finish the pancakes: Heat the oven to 350 degrees with a rack in the center. Set a metal rack in a sheet pan and place on the center oven rack.

After the pre-ferment has proofed for an hour, whisk the remaining 1 cup flour with the sugar, baking soda and salt in a small bowl. In a large bowl, whisk the eggs and oil until smooth. Scrape the pre-ferment into the egg mixture, then add the dry ingredients. Gently stir with the whisk until no traces of dry ingredients remain. It’s OK if the batter is lumpy.

Transfer the pancake from the skillet to the rack-lined pan in the oven for the centers to cook through, 2 to 5 minutes. To check, poke a paring knife in the middle and peek to see if any wet batter remains. Repeat with the remaining batter, reheating the pan between pancakes. You can serve the pancakes as they’re done or keep the earlier batches in the oven until all of the pancakes are ready.