Coffee Cake Muffins

muffin batter

• 2 cups (250g) all-purpose flour
• 2 tsp baking powder
• 1/2 tsp salt
• 1/2 cup (125ml) vegetable oil
• 1 cup (200g) granulated sugar
• 2 large eggs
• 2 tsp vanilla extract
• 1/2 cup buttermilk or sour cream

streusel topping

• 2/3 cups (83g) all-purpose flour
• 1/2 cup (100g) granulated sugar
• 1 tsp ground cinnamon
• 3 tbsp (45ml) melted butter

glaze – optional

• 1/2 cup powdered sugar
• 2–3 tsp milk or cream