How To Make Easy Applesauce Muffins

Name: How To Make Easy Applesauce Muffins
Cuisine: American
Ingredients: 100 g flour (1/2 cup + 2 tbsp.); 80 g oat flour (1 cup); 125 g butter (1/2 cup + 1 tbsp.) (softened); 250 g applesauce (1 cup); 115 g walnut or pecan (save some for topping) (1 cup); 75 g granulated sugar (1/3 cup + 1 tsp.); 75 g brown sugar (1/3 cup); 2 eggs; 1 teaspoon baking soda; vanilla extract or vanilla bean powder; Gingerbread spice mix; Pinch of salt; 25 g cold, diced butter (2 tbsp.); 3 tbsp. Rolled oats; 2 tbsp. Flour; 1 tbsp. Granulated sugar; 1 tsp. Cinnamon; Pecans; Optional: biscoff spread for filling