Blackberry Coffee Cake Muffins

Ingredients

• 56 g unsalted butter (4 tbsp.)
• 75 g light brown sugar (¼ c. + 2 tbsp.)
• 90 g all purpose flour (¾ c.)
• ¾ tsp. ground cinnamon
• zest of ¼ orange
• 100 g granulated sugar (½ c.)
• zest of ¾ orange
• 1 egg room temperature
• ½ tsp. vanilla
• 120 g greek yogurt room temperature (½ c. + 1 tbsp.)
• 130 g all purpose flour (1 c. + 1 tbsp.)
• 1 tsp. baking powder
• ¼ tsp. baking soda
• ¼ tsp. salt
• 100 g blackberries* (¾ c.)