Preheat oven to 375°F. Line a muffin pan with 12 cupcake liners.
In a medium bowl, whisk together?dry ingredients for muffins
In a large glass measuring cup or small bowl, combine wet ingredients.
Gradually pour wet ingredients into dry ingredients bowl and gently whisk until incorporated.
Making the crumble topping
In a medium bowl, pour in flour, brown sugar and oats. Stir ingredients together.
Pour in melted butter and stir ingredients together. Break up larger chunks of the crumble topping.
Assembling the muffins
Pour muffin batter into lined muffin pan about halfway full.
Sprinkle crumble topping on top of batter.
Bake for 20-22 minutes until muffin springs back when touched.
While the muffins are cooling, use a spoon to drizzle cappuccino icing over the muffins.
Preparing the glaze
Using a hand mixer, whisk softened butter.
Add 1 cup of powdered sugar and cream together.
Add ¼ cup of heavy cream and the espresso coffee.
Add remaining powdered sugar and heavy cream.
Taste icing. If bitter from coffee, add a bit more powdered sugar ¼ cup at at time. If too thick, add heavy cream 1 teaspoon at a time. Icing should be thin to be able to pour over muffins as a glaze.
Notes
You can replace the espresso with cinnamon in the muffin mix and simply omit in the icing recipe for a caffeine-free version of this muffin recipe.