Sift flour and salt into a large bowl. Stir in sugar. Whisk buttermilk or milk, egg yolks and ricotta in a jug until well combined. Using a large metal spoon, fold buttermilk mixture through dry ingredients
In a clean bowl, beat eggwhites until soft peaks form. Using a large metal spoon, fold one-third of the eggwhites through the batter until combined. Gently fold in remaining eggwhites
Stand mixture for 10 minutes. Swirl through frozen blueberries
Heat 25g butter in a large non-stick frying pan over medium heat. Using about 1/3 cup of batter per hotcake, spoon mixture into pan and cook hotcakes in 3 batches for 2-3 minutes on each side until pale golden
Wipe pan with paper towel and repeat to make 12 hotcakes
To serve, stack hotcakes on serving plates, dust with icing sugar and/or drizzle with maple syrup. Serve sprinkled with a few extra just-defrosted frozen blueberries
Tips & Hints:
Buttermilk gives these hotcakes a lovely light texture. They're fabulous for a weekend breakfast or brunch.