Perfectly Berry Muffins: Easy Recipe for Delicious Streusel Topping

Ingredients

• 100 grams (3.5 ounces) all-purpose flour
• 50 grams (1.5 ounces) sugar
• A pinch of lemon zest
• 60 grams (2 ounces) unsalted butter, melted
• 330 grams (11.5 ounces) all-purpose flour
• 200 grams (7 ounces) sugar
• 2 teaspoons baking powder
• 1/2 teaspoon baking soda
• 1/2 teaspoon salt
• 250 milliliters (8.5 fluid ounces) milk
• 2 eggs
• 30 grams (1 ounce) unsalted butter, melted
• 60 milliliters (2 fluid ounces) vegetable oil
• 150-200 grams (5.5-7 ounces) berries