Preheat the oven at 175ºC conventional oven and line a cupcake tray with 12 cupcake liners.
Start by boiling some water and weigh out the water so it can cool down a bit while preparing the other ingredients.
80 g boiling water
Sift together the all-purpose flour, baking powder, baking soda, cinnamon and salt and set it aside. Mix together the boiled water and milk and set it aside.
80 g boiling water, 220 g all-purpose flour, 1 ½ teaspoon baking powder, ¼ teaspoon baking soda, ½ teaspoon salt, 2 teaspoon cinnamon, 80 g whole milk
In a mixing bowl, using a hand whisk, whisk together the vegetable oil and sugar until well combined.
75 g vegetable oil, 200 g granulated sugar
Add the eggs one at a time into the mixture and mix it in until combined.
2 large eggs
Then add the sour cream and vanilla extract, mixing it in until combined.
25 g sour cream, 2 teaspoon vanilla extract
Scrape down the sides of the bowl. Continue by alternating between adding ⅓ of the flour mixture and ½ of the milk mixture, ending on the flour mixture. Mix in each addition until just combined. Using a rubber spatula, give the batter a gentle fold to make sure all of the ingredients have been combined.
Divide the cake batter into the 12 cupcake liners and bake them for 18-19 min.
Let the cupcakes cool in the hot pan. After 5 min, gently remove the cupcakes from the cupcake pan and let them cool down completely on a cooling rack.