Use a whisk to cream the butter and sugar until it's very soft and creamy.
Add the egg and vanilla and whisk again.
Add the flour, baking powder, salt, and mix using a spatula.
Add half the chocolate and all the praline and mix them in as well.
Use a large cookie scoop to portion the cookies. Flatten them and place more chocolate at the centre from the amount we didn't use before. Close the cookie up and form a ball. Flatten the dough balls slightly and place them on a baking tray lined with baking paper. Repeat with all the cookies, leaving space between them because they expand a bit in the oven. Bake the cookies in a preheated oven at 180°C/350°F for 12 minutes or until they're just cooked, to keep them soft.
Because of the praline, these cookies can sometimes be a bit wonky in shape. As soon as they come out of the oven, you can surround them with a cookie cutter and roll them inside it to even out the edges. You have to do this as soon as they come out of the oven.
Right afterwards, place extra chocolate chunks or chips on top and push them in slightly. This makes chocolate pools. Finish them with flaky salt.