Start by mixing together all the ingredients for the topping in a bowl and set aside. Then, mix sugar, egg, vanilla, and softened butter in another bowl using a hand mixer until it looks like cream.
Add the baking soda and milk then give it another good mix with your hand mixer.
Next, add the flour, vanilla, and cinnamon and mix everything together with a spatula until combined.
Grease your bread pan and pour the batter in. Bake it at 350°F for 55 minutes.
Once you take it out of the oven, let it cool for 20 minutes before spreading the topping on top. Now all that’s left is to cut it into slices and serve it up on a plate!