How to Make It
Prepare the Dough: Combine sour cream, butter, salt, and 1/3 cup of the granulated sugar in a small saucepan. Cook over medium-low, stirring occasionally, just until butter melts, about 4 minutes. Remove from heat, and cool to 100°F to 110°F.
Stir together warm water, yeast, and remaining 1 teaspoon granulated sugar in a small bowl. Let stand until foamy, about 5 minutes.
Combine sour cream mixture, yeast mixture, and eggs in the bowl of a heavy-duty electric stand mixer fitted with a dough hook attachment. With mixer running on medium-low speed, gradually add 3 3/4 cups of the flour, beating until a soft Dough forms and pulls away from sides but still adheres to bottom of bowl.
Turn it out onto a lightly floured surface. Knead until smooth and elastic, about 10 minutes, adding up to 3/4 cup flour, in very small amounts, if necessary to keep it workable. (Dough should be tacky but not sticky.) Place in a lightly greased bowl, turning to coat all sides. Cover and chill 8 hours or overnight.
Turn Dough out onto a lightly floured work surface. Roll into a 16- x 20-inch rectangle.
Prepare the Filling: Stir together brown sugar and cinnamon in a small bowl.
Sprinkle Filling evenly over Dough rectangle, pressing gently to adhere, leaving a 1-inch border on both long sides. Starting at 1 long side, roll up Dough, jelly-roll style. Using a piece of unflavored dental floss, cut off and discard 1 inch from each end of roll. Cut roll crosswise into 12 (1 1/2-inch-wide) pieces.
Prepare the Topping: Stir together all ingredients in a small bowl.
Assemble the sticky buns: Pour Topping into a lightly greased 13- x 9-inch metal baking pan. Spread to coat bottom of pan evenly. Sprinkle evenly with pecans. Place rolls, cut side down, in baking pan with sides touching. Cover with plastic wrap, and let stand in a warm place until rolls double in size, 45 minutes to 1 hour.
Preheat oven to 375°F. Remove and discard plastic wrap from buns. Bake in preheated oven until golden brown, 20 to 22 minutes. Cool in pan 5 minutes. Carefully invert buns onto a serving platter. Serve warm.