1-First Step: Gather all your ingredients and preheat your oven to 175 degrees Celsius. This helps everything come together smoothly and ensures the oven is ready when you are.

2-Second Step: In a large mixing bowl, cream together the 50 grams softened butter and 100 grams granulated sugar until light and fluffy, which takes about 2-3 minutes with a hand mixer.

3-Third Step: Add the 1 large egg and 1 teaspoon ground cinnamon to the bowl, then mix well until fully combined, creating a smooth batter base.

4-Fourth Step: Gradually stir in the 150 grams all-purpose flour and 1 teaspoon baking powder, alternating with 120 ml milk to avoid lumps, and mix until the batter is even.

5-Fifth Step: Pour the batter into a greased mini cake pan, sprinkle the 1 tablespoon cinnamon-sugar mixture on top, and smooth the surface for an even bake.

6-Sixth Step: Bake in the preheated oven for 20-25 minutes, or until a toothpick inserted in the center comes out clean, allowing the cake to rise and set properly.

7-Final Step: Let the cake cool in the pan for 10 minutes, then transfer it to a wire rack to cool completely before serving, which helps it firm up and makes slicing easier.