The Ultimate Rainbow Cake Recipe! | Cupcake Jemma

Hello and welcome back to my kitchen at home. Now before we get started I just want to say a quick thank you to Squarespace for supporting this video. Squarespace offers a complete all-in-one platform to help create websites and even online stores and you can check them out and take advantage of a unique offer code using the link in the description box below but for now let's get on with the recipe. If you've subscribed to my channel for a while then you've almost certainly watched my rainbow cake video which is the most popular video on the channel. It's got over three million views which is bonkers. So rainbows obviously aren't going anywhere soon so I thought three years on that I would pimp the rainbow and this video is for a triple rainbow cake. I've got a vanilla cake, just a plain white vanilla cake here. You can use whatever cake you like, you can even make the rainbow cake and make this a quadruple rainbow cake but I mean that will take ages. Just whatever your favourite cake is and I've got a seven inch cake and I've already trimmed the sides to seven inches and also leveled it using a cake leveler so it's all ready to go. I've also got here some white vanilla buttercream and this is four times my usual recipe so go and click the link for the recipe for that. So I'm going to mix my colours up, I'm going to do purple, blue, green, yellow, orange and red just like a real rainbow. Obviously there's way more colours in a rainbow but I ain't got time for that. So I've got my six bowls here. I'm using paste colours as I normally do and if you want to know a bit more about buttercream, how to colour it and what to use then check out my masterclass video because there's a lot going on in there but it's super concentrated colour paste which is why I like to use it because it doesn't change the consistency of the icing too much. Perfect, so now I'm going to carry on with the rest of the colours using a little bit more each time as I work my way up to red. So I've mixed up all my colours and I've put them into piping bags and I haven't put nozzles in them or anything because six nozzles is quite a lot. I'm just going to snip the ends off. So now I'm going to start decorating the cake and I'm going to use a turntable because it does make things a lot easier. You can do it without but it just makes it much easier and I've also got an eight inch cake drum and if you want to know more about the essentials of cake decorating I have done a special essentials kit video so check that out and I'm going to start with my first layer but first I'm just going to put a small amount of buttercream just to stick the cake onto the board and this is where things start to get interesting because I'm about to make a rainbow inside my cake. So I'm going to start by piping a circle of red around the outside and now an orange circle right next to that one and then just keep going with all your colours until you get to the purple in the middle. So now I've done one layer I just need to keep going till I reach the top. Okay so we've got our rainbows inside and now I'm going to give this cake a crumb coat so that we're going to be ready to do the rainbow on the outside. So crumb coat's done now this needs to go into the fridge to chill out for about 20 minutes. While my cake is chilling out in the fridge I'm going to get on with making the next part of my rainbow cake which is an actual rainbow and this is going to sit on the top and it's going to be really cute and I'm making it out of sugar paste which I have added gum tragacanth to and what that does is turns it into modelling paste which means that a sugar paste which is normally nice and squishy will dry quite firm so you can make things like models and rainbows out of it. So I'm going to start with my purple just get a little piece of it and I want to make that into a sausage uh kind of the width of a pencil I guess maybe a little bit smaller than that so I'm just going to roll it between my hands to get that started and then just put it onto the board and using both hands and gently kind of pulling out at the same time just roll it back and forth until it becomes a long sausage. Now you only need about three or four centimetres of this. I'm just going to use a sharp scalpel to trim it and then I'm going to put it onto this little board here and curve it round so I will use that as a template for the rest of my colours and now repeat that with the blue. Now with this one I'm going to trim one end take it over to my purple and then line it up on one side and curl it around to the other side and that way you know how long it's supposed to be and then just keep going with the rest of your colours until you get to the red. So now that we've got everything the right size and in the right place we just need to fix it all together and I'm going to be using edible glue you can use a small amount of water it'll do a similar thing but this is really really strong stuff so because this rainbow is going to be sitting upright it's best to use the strong stuff so you can get hold of edible glue but for now push away all the colours and now using a small paintbrush and a very small amount of the glue I'm going to paint a thin line just around the top of my rainbow and now I'm just going to bring my blue line it up and then gently press it together and then just keep going. All right so it's looking like a pretty cute rainbow but it's not going to really hold itself up on its own so I'm going to use little toothpicks which I've trimmed a bit by about an inch and I'm going to just paint the tips of them with the edible glue and then stick them in the bottom and then you just need to let that set ideally overnight but it should set quite firm within a few hours. Now things are going to get really exciting because I am going to show you how to do Amazing right? So I'm going to start with my purple I've got my cake out of the fridge it's been in there for 20 minutes and it is nice and cool I've got it on my turntable because that's going to make life a lot easier and I also have a small cranked palette knife and it's important to use a small one because you've got a lot of colours to do on this cake and if you use a big fat palette knife you're just going to get too much icing on. I'm going to start by applying my purple icing to the very bottom so what I'm doing is I'm getting a small amount onto my palette knife and just a little section at a time applying it quite thickly to my cake. Now obviously there's a lot of icing here and I've got to fit six colours so I'm going to tidy things up a little bit so I'm just cleaning my palette knife off onto my bowl and then around this side I'm going to just tidy up the top ledge of that colour. I'm just going to wipe my palette knife because I'm now going to move on to the blue and I'm going to do exactly the same thing just on top of that purple. Now I'm going to keep going and don't worry it does look very scrappy and like there's way too much icing at this point but that's absolutely as it should be because we're going to take the excess off but for now just keep going until you reach the top. Now after the orange it's obviously time for red but I'm going to start with the top first and work my way down so I'm going to just blob a bit of this buttercream onto the top and spread it out. Now as you can see the red icing has kind of blobbed over the side and we're going to use that to fill in the gaps but I'm going to need a little bit more. Now it's covered but it's very scrappy and messy so this is the cool bit and this is where I smooth everything out and get rid of the excess. So I've got myself a cake scraper here which is very straight and hard and cool and very gently and carefully I'm going to take away the excess. So as you can see my rainbow is taking shape I've got a lot of excess mess on this I'm going to scrape that off onto some baking paper because I don't need it anymore. Now you're scraping off the excess but you don't want to scrape off all the icing so do be gentle and you'll see that you'll have some air bubbles just keep going around and gently smoothing those out they'll go eventually and now that you've got the sides cleaned up you'll notice that the icing on the top has become quite messy so very gently using your cake scraper brush it in to the middle from the outside. Okay it's looking really good my board's a little bit messy so I'm just going to use my cake scraper to just scrape off this messy purple icing that's got all over it. So it's time to finish this off so I've got my rainbow inside I've got my rainbow on the outside and now it's time to put my rainbow on the top to complete my triple rainbow cake. So I'm just going to grab my little rainbow I made this one yesterday so this one's nice and firm and I'm going to poke him in right in the middle and I've got a little bit of white buttercream left so I'm going to finish the cake off with a few clouds. Ta-da! How cute is my triple rainbow cake it is so rainbow-y and exciting triple rainbow it's so intense what does this mean? Well I hope this satisfies the unicorn in you and please let me know if you make this by tagging me in Instagram and Twitter using the hashtag cupcake jammer and don't forget you can subscribe to my channel you can share this video and comment on it and chat to each other and make friends and thanks once again to Squarespace for supporting this video building your own website is brilliant if you are thinking about starting your own baking business or even if you just want a cute way to show off your creations but it can be tricky if like me you're not very good with computers and code Squarespace makes it really easy with award-winning designer templates 24-7 customer service online stores and domains if you've been thinking about starting your own website then check them out at squarespace.com there's a free trial and if you use offer code jammer and you'll get 10% off your first purchase let them know you heard about them here and make your next move with Squarespace I'll see you next week bye