Things you’ll need
- 1 ¾ cups all-purpose flour
- 1 ½ teaspoons baking powder
- ½ teaspoon salt
- ½ cup mango powder (1 package freeze dried mango, pureed)
- 1 cup butter
- 1 cup sugar
- 3 large eggs
- ¼ cup milk
Sweet and sour soak
- ½ cup water
- ½ cup sugar
- ½ cup lime juice
- ½ cup lemon juice
- Large bowl
- Medium bowl
- Rubber spatula
- Electric mixer with attachments
- Parchment cut to fit milkshake cup
- Metal milkshake canister
- Small serrated knife
- Small saucepot
- Squeeze bottle
- Cake turntable
- Baking sheet
- Small cardboard drum
- Small angled spatula
- Offset spatula
- Large straw for support
- Cutting board & knife
- Pink and purple frosting in piping bags
- White frosting in a piping bag fitted with 1M tip
- Blue frosting in a piping bag fitted with #10 tip
- Starbucks green straw
- Pink, purple and light blue sanding sugar
- White and green fondant for logo (optional)
Let’s get started!
- Preheat oven to 300°F. Line the inside and bottom of a metal milkshake canister with parchment and spray well.
- In a medium bowl, mix flour, baking powder, salt and mango powder together.
- In a large bowl, beat butter and sugar together until light and fluffy.
- Add eggs, one at a time, and beat well between each addition.
- On low speed, alternate adding the flour mixture and the milk to the butter mixture, beginning and ending with the flour mixture.
- Scoop batter into milkshake canister and place onto a cookie sheet.
- Bake for 1 ½ to 1 hour and 45 minutes.
- Cool cake in the can for 20 minutes, then remove and cool standing up.
- In a small saucepot, bring the water, sugar and juices to a boil and cook until sugar is dissolved. Allow to cool completely and then pour the soak into a squeeze bottle.
- Cut the cake horizontally into 3 pieces and then soak each cake well with sour soak.
Time to decorate!
- Use buttercream to glue the three pieces of cake back together. Insert a thick straw into the center of the cake for support.
- Frost the cake from bottom to top, starting with purple and finishing with pink. Use an offset spatula to smooth the frosting and create an ombre effect (PICTURE at ).
- Use a small knife to carve out a squiggly line around the cake. Pipe light blue frosting into the squiggly cavity and then use an offset spatula to smooth (PICTURE at ).
- Use a 1M tip to top the cake with white buttercream frosting to look like whipped cream.
- Sprinkle sanding sugar and insert a straw.
- Add a fondant Starbucks logo to make the Frappuccino (optional).
- TaDa! Now you don’t have to go to Starbucks to enjoy your favorite unicorn treat!