Answer:
1. Mi postre favorito es el pastel.
My favorite dessert is cake.
2. Mi bebida caliente favorita es el café.
My favorite hot drink is coffee.
3. Mi bebida fría favorita es la limonada.
My favorite cold drink is lemonade.
4. Mi desayuno favorito son las tostadas.
My favorite breakfast is toast.
Slightly unsure about 5, but I hope I could help with these ones!