Skip to main content

Purple Sweet Potato Streusel Cake



There are many streusel cake recipes on the internet but I'm not sure whether you've come across a Sweet potato streusel cake.  This cake is delectable, something different and I like the crumbly streusel especially  when the cake is served warm.

















I  waited patiently for the cake to cool before I could perform an autopsy as  I was very anxious to see the colour........ and was most delighted to be greeted with a nice cool purple!

Recipe for Purple sweet potato streusel cake

Ingredients
  • 8 oz cups self-raising flour, sifted
  • 2.1/2 oz butter
  • 4 oz caster sugar
  • 2 eggs
  • 1/4 cup canola/corn oil
  • 1 tsp vanilla
  • 1 cup pureed or smashed purple sweet potatoes 
  • 1/3 cup raw sweet potaotes, diced small
  • 3 tsp water
Streusel
  • 1 oz butter
  • 1.1/2 oz sugar
  • 2.1/2 to 3 oz plain flour
  • 1/4  tsp vanilla
Method
  1. Prepare the streusel by mixing the butter into the flour, sugar and vanilla till crumbly.  Set aside.
  2. Cream butter and sugar till creamy and light, add in the eggs, mix well.
  3. Add in the oil and sweet potato puree.  Mix till well combined.
  4. Add in the sifted flour, mix thoroughly followed by vanilla and water. 
  5. Add in the the sweet potato bits, mix well, scraping from the sides and bottom of the mixing bowl.
  6. Pour the batter into a lightly greased and floured  24 x 13 x 7 cm loaf pan.
  7. Sprinkle the streusel on top.
  8. Bake in a preheated oven @ 180 deg C for 30 to 35 mins.  till golden brown.  Test with a skewer till it comes out clean.
  9. Remove from the oven and let cake cool in pan for about about 10 mins., before unmoulding and letting it cool on a wire rack.
  10. Best to serve warm with a dollop of ice cream if desired.



I'm submitting this post to  Bizzy Bakes

Comments

  1. I love streusel cake but this is definitely first time seeing a purple sweet potato cake. Beautiful cake. Book-marking it ...

    ReplyDelete
    Replies
    1. Thanks, Chris. If you can't find purple sweet potatoes, then you can use orange or yellow coloured ones, will be nice too.

      Delete
  2. hi ms cheah,

    do not mind if i asked u 1 question that i confused after reading ur recipe " chocolate cake with chocolate topping" 6 tsp baking powder used in this recipe is it correct? pls dont mind.

    ReplyDelete
    Replies
    1. Yes, it's 6 tsp B.P. because the batter is rather wet with the cocoa and milk mixture, so needs more raising agent to make the cake rise. I've linked up with the Chocolate cupcakes and since I doubled the recipe, all the ingredients are also doubled.

      Delete
  3. Replies
    1. Thank you, Ann. When I saw the purplish colour I was so pleased .... colour was my priority and the taste was a bonus!

      Delete
  4. I'm admiring too the look of having pecks of purple colour in your cake. Very nice!

    ReplyDelete
  5. cheah, your streusel topping looks very nice. I dont know why my streusel didnt come out as nice as expected. Does hard or semihard butter matters?

    ReplyDelete
    Replies
    1. I normally use butter at room temperature, if you want it more crumbly, add a bit more flour, then chill in the fridge to make it a bit dry.

      Delete
  6. Your cake looks so moist and pretty with the purple. And the streusel adds a nice crunch and texture! Lovely!

    ReplyDelete
    Replies
    1. Yes, very nice if eaten warm and I like the sweet potato bits too, gives the cake more bite.

      Delete
  7. Sweet color in your cake, I like the purple bits too! Looks yummy!

    ReplyDelete
  8. Wow. I have never seen this before. I did once bake a beet cake but the coloring disappeared and the cake was yellow. I wonder what the difference is.

    ReplyDelete
    Replies
    1. Was there baking soda in the recipe? Baking soda can 'change' the colour of the cake. Why not try with self-raising flour if you use plain flour in your recipe.

      Delete
  9. Definitely not seen a sweet potato strudel cake before. I like the purple colour.

    ReplyDelete
  10. Whoa, this cake looks incredibly good and very interesting too. Bet your hubby is loving it. Happy weekend to you!
    Cheers
    Kristy

    ReplyDelete
  11. I noticed in the recipe that you listed 3 tsp of water but didn't mention when to put it in, I was just wondering which step it goes in?

    Thank you, Harrison

    ReplyDelete
    Replies
    1. Ooops, thanks for the alert. Add in the vanilla and water with the flour, i.e. picture 5 of the step by step illustration.

      Delete

Post a Comment

Thanks for dropping by. Please click on 'Anonymous' if you do not have a blog but do leave your name after the comment because I would like to know who you are.

Popular posts from this blog

Gula Melaka Kuih Talam ~ 椰香打南糕

After successfully making the  Kuih Talam  with much trial and error, I ventured into trying out making this Gula Melaka Kuih Talam.  What is gula melaka one may ask?  Simply put, it's just palm sugar made from coconut palm.  The slightly saltish top coconut layer pairs very well with the dark and intense flavour of the palm sugar from the bottom layer, and this kuih can be served for breakfast or snack on at any time of the day.






Gula Melaka Kuih Talam ~  椰香打南糕  

Ingredients (A)
150 gm gula melaka/palm sugar350 ml water2 pandan/screwpine leaves60 gm rice flour25 gm green pea flour1.1/2 Tbsp tapioca flour100 ml thick coconut milk1/4 tsp lye/alkaline water(B)  Top coconut layer 1.1/2 Tbsp tapioca flour30 gm rice flour15 gm green pea flour100 ml thick coconut milk250 ml water1/2 tsp saltMethod for (A) Cook gula melaka, water and pandan leaves till gula melaka is dissolved, strain into a bowl and let cool.Mix the rice flour, green pea flour, tapioca flour with the cooled gula melaka syrup…

Cherry Loaf Cake ~ 樱桃蛋糕

I baked this old-fashioned Cherry Loaf using the Marble Butter cake recipe but adjusted the recipe as I only used three eggs instead of four to fit into the loaf pan.   I remember that when I was little, I was attracted by the red cherries as any other kid and would gingerly take them out and eat them first.    The cake was secondary.  This cake is soft and moist infused with the sweet glace cherries giving it a lovely combination of flavours.




Cherry Loaf Cake ~  樱桃蛋糕
Ingredients (A)

173 gm unsalted butter100 gm caster sugar3 egg yolks150 gm self-raising flour, sifted45 ml milk100 gm glace cherriespinch of salt(B)     3 egg whites           30 gm caster sugar
Method Rinse the cherries lightly with water to rid of the syrup, pat dry, cut into quarters.  Dust with some sifted flour.Cream butter and sugar till light and fluffy.Add in the egg yolks one at a time, mix well.Fold in sifted flour alternating with milk and mix in the cherries.In a clean mixing bowl, beat the egg whites till foamy, …

Puff Pastry Egg Tarts - 2 酥皮蛋撻

I took the opportunity to try my hands at making puff pastry from scratch when I was on vacation as the weather was quite cooling and I assumed that the dough wouldn't be sticky and messy to handle.
I could make both oil and water dough easily and there were no 'sweat and tears', LOL!  The pastries turned out nice and flaky and everybody gave their thumbs up for this dim sum, especially my dear grandnephew who asked for more!


Oil dough - Sieve the plain flour into a mixing bowl, add in the cold, cubed butter, mash with a fork and slowly combine to form a soft dough.  Wrap up with clingwrap and keep in the fridge for 30 mins.  (You can do this with a food processor if you wish),


Water dough - Sieve the plain flour into a mixing bowl, add in the slightly  beaten egg yolks, mix well, add ice cold water gradually,( you may not require the whole amount of water as too much water can make the pastry tough), mix well and form into a dough.  Wrap up with clingwrap and keep in the f…