In a bowl, pour the milk and drops of lemon juice and let sit for 10 minutes.
Mix all the dry ingredients (flour, baking powder and salt).
Beat the egg with the milk then add the previously melted butter.
Then mix the two preparations with a spatula. Leave to rest for 10 minutes.
Heat a little oil in a pan, then form the blinis by placing tablespoons of dough on them. Cook over medium-high heat for about 2 minutes, until small holes appear on top. Flip your blinis and cook for another 30 seconds on the other side.
Arrange on a plate.
Continue until the dough is used up.