This is used for croissants, pains au chocolat and Danish pastries. It contains a lot more butter than enriched dough, and the butter is incorporated into the dough by lamination, as for puff pastry. This dough contains yeast, which means that it tends to shrink when you start rolling it. Don’t despair! Persevere, and press down on the rolling pin so the dough is nice and flat before you add the butter. It’s essential to keep the mixture chilled between each turn, otherwise the butter will soften and you’ll be tempted to add more flour, causing the dough to shrink. This is why I recommend using a cool marble slab for all doughs and pastries.