Plum Crumble - Dinner With Julie

Ingredients

• 15-20 plums, pitted and halved
• 2 Tbsp. sugar (or more, if the plums are very tart)
• a shake of cinnamon
• 1 cup all-purpose flour (you could use whole wheat flour, or oats)
• 1/2 cup sugar
• 1 tsp. baking powder
• ¼ tsp. salt
• 1/3 cup butter