Banana Nut Muffins - Cooking Restored

Ingredients

• 2 cups flour
• 1 tsp baking powder
• 1/2 tsp baking soda
• 1/2 tp salt
• 1 cup chopped walnuts
• 3 ripe bananas
• 1/4 cup canola oil
• 1/2 cup unsalted butter, melted and cooled
• 1/2 cup sugar
• 1/2 cup dark brown sugar
• 2 eggs, room temperature
• 1/2 tbsp vanilla
• 1/2 cup buttermilk, room temperature
• 1/4 cup flour - for the crumble
• 1/4 cup oats - for the crumble
• 1/4 cup dark brown sugar - for the crumble
• 1/2 cup chopped walnuts - for the crumble
• 1/4 tsp cinnamon - for the crumble
• 1/4 cup unsalted butter, softened - for the crumble