In a large bowl, combine sugar, molasses, oil, yogurt, plant milk and vanilla with a whisk.
Fit a mesh sifter on top of the bowl with the wet ingredients and add into the sifter: whole wheat flour, baking powder, baking soda, salt and all of the spices.
Sift the dry ingredients into the wet ingredients and stir with a spatula until just combined.
Scrape the batter into prepared 8x4 loaf pan, using the spatula to spread the batter into the corners of the pan.
Top the batter with all of the streusel, gently pressing the streusel into the batter.
Bake in a 350* oven for 55-60 minutes. Test doneness with a toothpick inserted into the center of the loaf. It should come out clean.
Cool completely before removing from the pan and slicing. Enjoy!