Fluffy American Pancake Ingredients : 135 g / 4¾ oz plain flour 1 tsp baking powder ½ tsp salt 2 tbsp caster sugar 130 ml/ 4½ fl oz milk 1 large egg, lightly beaten 2 tbsp melted butter (allowed to cool slightly) or olive oil, plus extra fo cooking Method : Sift the flour, baking powder, salt and caster sugar into a large bowl. In a separate bowl or jug, lightly whisk together the milk and egg, then whisk in the melted butter. Pour the milk mixture into the flour mixture and, using a fork, beat until you have a smooth batter. Any lumps will soon disappear with a little mixing. Let the batter stand for a few minutes. Heat a non-stick frying pan over a medium heat and add a knob of butter. When it’s melted, add a ladle batter (or two if your frying pan is big enough to cook two pancakes at the same time). It will seem very thick, but this is how it should be. Wait until the top of the pancake begins to bubble, then turn it over and cok until both sides are golden brown and the pancake has risen to about 1 cm (1/2 in) thick. Repeat until all the batter is iused up. You can keep the pancakes warm in a low oven, but they taste best fresh out the pan. Serve with lashing of real maple syrup and extra butter if you like. Adopted from: http://www.bbc.com/food/recipes/fluffyamerican pancak_74828 (30th November 2018) "... lightly whisk together the milk and egg, ..."(Step 1) What does the underlined word mean?

Question

Fluffy American Pancake

Ingredients :

135 g / 4¾ oz plain flour
1 tsp baking powder
½ tsp salt
2 tbsp caster sugar
130 ml/ 4½ fl oz milk
1 large egg, lightly beaten
2 tbsp melted butter (allowed to cool slightly) or olive oil, plus extra fo cooking

Method :

Sift the flour, baking powder, salt and caster sugar into a large bowl. In a separate bowl or jug, lightly whisk together the milk and egg, then whisk in the melted butter.
Pour the milk mixture into the flour mixture and, using a fork, beat until you have a smooth batter. Any lumps will soon disappear with a little mixing. Let the batter stand for a few minutes.
Heat a non-stick frying pan over a medium heat and add a knob of butter. When it’s melted, add a ladle batter (or two if your frying pan is big enough to cook two pancakes at the same time). It will seem very thick, but this is how it should be. Wait until the top of the pancake begins to bubble, then turn it over and cok until both sides are golden brown and the pancake has risen to about 1 cm (1/2 in) thick.
Repeat until all the batter is iused up. You can keep the pancakes warm in a low oven, but they taste best fresh out the pan.
Serve with lashing of real maple syrup and extra butter if you like.

Adopted from: http://www.bbc.com/food/recipes/fluffyamerican pancak_74828 (30th November 2018)

"... lightly whisk together the milk and egg, ..."(Step 1)
What does the underlined word mean?