Preheat the oven to 350 degrees F (175 degrees C). Grease 4 mini loaf pans.

Make the bread: Cream together sugar, butter, cinnamon, and salt with an electric mixer until fluffy, about 5 minutes. Add eggs and mix until combined. Add sour cream and vanilla, and mix until combined.

Combine flour and baking powder in a separate bowl. Add to egg mixture and mix well. Stir cinnamon chips into batter. Spoon batter into 4 mini loaf pans until 2/3 full.

Make the topping: Mix 3 tablespoons sugar and cinnamon together in a small bowl. Sprinkle topping evenly over the batter in each loaf pan.

Bake in the preheated oven until a toothpick inserted into the centers come out clean, 35 to 38 minutes. Let cool completely before removing from the pans.