Mix together butter, oil, and sugars; mix in wet ingredients; add dry ingredients; stir until just combined.

Fill 18 muffin cups 2/3 of the way full.

In separate small bowl, combine streusel ingredients; sprinkle over prepared muffin batter.

Bake @ 350℉ for 20-22 mins; mix together icing ingredients and drizzle over muffins.

Enjoy for breakfast, dessert, or an afternoon snack!

Perfect for parties; or freeze leftovers for at least 2 months!