Microwave the soy milk for about 1 minute and 30 seconds, until warm but not too hot or it will kill the yeast.
In a large bowl, add the warm soy milk, sugar and yeast. Stir a little bit; the yeast will get foamy.
To the yeast mixture, add the melted vegan butter, salt and 4 ½ cups of flour. Stir with a large spoon until it comes together. Add additional flour, as needed. Alternatively, use a stand mixer with a dough hook and mix on low until the mixture pulls away from the sides of the bowl. It should still be soft and slightly sticky.
If using a stand mixer, simply mix with the dough hook until you have a smooth ball of dough. If not, turn the dough out onto a lightly floured surface, and knead for 3-4 minutes until you have a smooth ball of dough.
Place the dough in a lightly oiled bowl, cover with a towel and let it rise in a warm place for 20 minutes.
Preheat the oven to 375 degrees F (skip this for make ahead option) and grease a 9x13 inch baking dish.
Spread the chopped pecans in the bottom of the greased pan.
Combine the rest of the topping ingredients (vegan butter, brown sugar and maple syrup) in a small saucepan over medium heat. Stir until the butter has melted. Simmer for a few minutes, stirring frequently.
Remove from heat and pour it over the pecans in the dish.
Sprinkle a clean counter or pastry mat with flour. Punch the dough down and use a rolling pin to roll the dough into a large rectangle, about ½ inch thick.
Spread the softened vegan butter over the dough, then sprinkle with brown sugar and cinnamon.
Starting with the long edge closest to you, roll the dough into a tight log.
Using a serrated knife (or plain floss!) cut off the two ends. Slice the rest into 12 rolls.
Place the rolls on top of the pecan mixture in the baking dish.
If you have refrigerated the rolls overnight, let them sit at room temperature for about an hour before baking. Bake for 30-35 minutes, until golden brown and the centers are cooked through.
Remove the baking dish from the oven and immediately invert (very carefully!) onto a serving tray or other large baking dish.
Serve these sticky sweet buns immediately and enjoy!
