In a medium bowl, whisk together the flour, cornstarch, baking powder, baking soda and salt.
In a smaller bowl, whisk together the sugar, agave, milk, oil, lemon zest, lemon juice and vanilla.
Pour over the dry ingredients and whisk everything together until smooth. Cover the batter and let it chill in the fridge for minimum 2 hours or overnight.
When you’re ready to bake, preheat your oven to 220°C/425°F.
Lightly but evenly grease the pan with the softened refined coconut oil, then dust evenly with flour. Make sure to remove the excess by giving it a few taps on your countertop.
Using a piping bad or a spoon, fill each cavity with 25-28 g of batter straight from the fridge.
Bake for 6-8 minutes until the edges are golden and they’ve risen, then reduce the temperature to 160°C/320°F and continue baking for 2-4 minutes.
Let them cool about a minute before turning each one on their side in the pan to prevent the hump from falling slightly and letting them cool completely.