Raspberry and Blueberry Muffins

Name: Raspberry and Blueberry Muffins
Prep time: 15 min
Cook time: 15 min
Total time: 30 min
Cuisine: European, American
Ingredients: 45 g unsalted butter (at room temperature); 12 g vegetable or canola oil; 90 g brown sugar; 1 egg; 1 tbsp honey; 45 ml milk; 1/2 tsp baking powder; 1/2 tsp cinnamon; 120 g all purpose flour; 1/2 tsp salt; 40 g raspberries; 40 g blueberries; 40 g traditional oats; 4 tbsp all purpose flour; 30 g unsalted butter (at room temperature); 50 g brown sugar