Measure out your ingredients and separate the egg, taking care not to get any egg yolk into the egg white.
Brown the butter. Melt the butter in a small saucepan over medium heat until brown specks appear on the bottom of the pan. Remove from the heat and allow to cool slightky.
Whisk the egg whites in a bowl using an electric hand whisk (or in a stand mixer with the whisk attachment ) until they are white and frothy and form soft peaks.
Make the blini batter. Sift the flour, salt, and pepper into a mixing bowl, and slowly add the egg yolk and half the milk whilst whisking with a fork to combine. Then, stir in the remaining milk and melted browned butter.
Fold in the whipped egg whites with a spatula to keep the mixture light and airy.
Fry teaspoons of blini batter in a lightly greased, non-stick frying pan over medium heat, flipping after 20-30 seconds until a light golden brown on each side.
Transfer the cooked blinis to a paper towel-lined plate whilst you finish cooking all the batter.
Notes
Brown butter in a pale-colored pan to keep an eye on the color and remove the pan from the heat before it burns.
Wipe down the bowl and whisk attachment with a paper towel dipped in white wine vinegar before you whisk the egg whites to make sure there is no residual fat that will cause the meringue to fail.
Use a teaspoon to measure out the blini batter to get perfectly round bite-sized blinis. It is the ideal size for a canape, which should always be one single bite.