You can soften butter by heating it in a microwave, an oven, or a bain-marie.
Use a toothpick and insert it into the center of your cake. When you pull it out, it should come away clean if the cake is done.
The cake pan can be replaced by any hear resistant container.
You do not have to worry about the temperature of eggs. In addition, it is recommended to beat eggs before measure it if your recipe calls for whole eggs.
You can decide how much batter to fill in the mold. Please keep in mind do not pour too much batter or it may overflow from the mold while baking.
Cookie and mini cake recipes are very suitable for beginner bakers. You only have to search recipes and follow the instructions to make the products.
Any types of butter are available for baking, but the unsalted butter is recommended.