Mix together the brown sugar, flour, and cinnamon. Then, mix in butter, cut up into small pieces. Mix until small clumps form.
Pumpkin Coffee Cake
Mix together the flour, baking powder, baking soda, salt, cinnamon, nutmeg, ginger, cloves, and allspice until evenly distributed. In a separate bowl, mix together the pumpkin, yogurt, brown sugar, syrup, oil, and egg.
In a 9x9 greased pan, pour in the pumpkin coffee cake mix. Spread with a spoon or spatula until it's even on top.
Place the crumble topping on top of the pumpkin coffee cake, evenly distributing. Press gently into the batter to form a crust.
Bake for about 30 minutes. Insert toothpick to detect if the cake is done.