Hi Martina! Desserts of all kinds can be tricky! I find that if I'm baking it is very necessary to have my butter and my eggs at room temperature before I start. Making sure to 'cream' your butter and sugar very well, until quite pale, when making any cake will ensure a lovely fluffy result. Being sure that all your ingredients are weighed out exactly according to the recipe as well as ensuring the temperature of your oven is exact to achieve the best results. I hope these few tips will help you on your way to making some gorgeous desserts! Let us know if you have a query on a specific recipe or technique as they come along.