Gather the muffin ingredients - * Apple cider * Flour * Sugar * Baking powder * Cinnamon * Cardamom * Salt * Butter * Eggs
In a large bowl, combine the apple cider, melted butter, and eggs. Whisk until they are fully combined.
Next, add in the flour, sugar, salt, baking powder, cinnamon, and cardamom. Whisk just until no large lumps of flour remain.
Divide the batter evenly between the 12 muffins— the batter should fill each hole about 3/4 of the way.
Gather the streusel ingredients - * Flour * Butter * Brown sugar * Cinnamon
Combine the melted butter, flour, brown sugar, and cinnamon in a small bowl until it is fully combined and starts to clump together.
Sprinkle it evenly over the muffins. Bake the muffins in a preheated oven for 20-25 minutes, or until they are lightly browned on top and a toothpick inserted into the center comes out clean. Remove them to a wire rack and allow them to cool before placing them in an airtight container.