Harry Potter Birthday Castle Cake

"This grand dessert stars a Lemon Drop cake, Dumbledore’s favorite muggle flavor, with an interior that’s studded with all the house colors."
 
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photo by Food.com photo by Food.com
photo by Food.com photo by Food.com
photo by Food.com photo by Food.com
photo by Food.com photo by Food.com
photo by Food.com photo by Food.com
Ready In:
15hrs 30mins
Ingredients:
36
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ingredients

  • For Cake

  • Harry Potter Lemon Drop Confetti Cake for cake
  • For the Filling

  • 3 cups blue buttercream frosting
  • 2 cups yellow buttercream frosting
  • 1 cup red buttercream frosting
  • For Spell Books

  • Harry Potter Spell Books to decorate cake
  • For the Potions

  • 12 cup water
  • 12 cup sugar
  • electric green gel food coloring
  • neon blue gel food coloring
  • super red gel food coloring
  • assorted pipettes for decorating cake
  • For Castles

  • Harry Potter Castles to decorate cake
  • For the Broom Stick

  • 1 chocolate pocky stick
  • 3 licorice, strings
  • melted black candy melts in piping bag for decoration cake
  • For the Letters

  • Harry Potter Letters to decorate cake
  • For the House Points

  • 1 red rock candy stick
  • 1 yellow rock candy stick
  • 1 blue rock candy stick
  • 1 green rock candy stick
  • For the Fireplace

  • 2 marshmallow treats for cake
  • edible black spray for decoration cake
  • For the Platform Numbers

  • melted black candy melts in piping bag for decorating cake
  • For the Wand

  • 1 licorice string, cut to about 4 inches
  • melted black candy melts in piping bag for decoration cake
  • For the Brick Wall

  • 1.5 (16 ounce) bags square marshmallows
  • edible red spray for decorating cake
  • Additional

  • 3 12 lbs white buttercream frosting
  • 1 lb silver candy rocks spread evenly on a sheet tray for decorating cake
  • melted white candy melts in piping bag to decorate cake
  • 3 blue sour strings candies
  • 1 red and yellow striped candy belt candy
  • 9 bubble tea straws to build cake
  • 1 lb lime green sprinkles, spread evenly on a sheet tray
  • 3 cups green frosting, in piping bag with grass tip
  • 3 peach ring candies
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directions

  • Bake the Cakes.
  • Fill the Cakes:

  • Unwrap the large cakes layers. Place a cake board on a turntable and spread a little blue buttercream in the center. Place a cake layer on top.
  • Add the buttercream on top of the cake and smooth over. Place the second cake layer on top. Gently press down on the top to sandwich it all together.
  • Wrap the cake in plastic wrap and refrigerate for at least 2 hours.
  • Repeat with the remaining layers, using yellow buttercream for the middle tier and red buttercream for the top tier.
  • Make the Spell Books.
  • Make the Potions:

  • Add sugar and water to a small saucepan over medium-low heat. Heat until sugar dissolves, whisking occasionally.
  • Divide mixture into three bowls. Color one bowl green, one bowl blue, and one bowl red.
  • Fill assorted pipettes with different colors and set aside.
  • Make the Castles.
  • Make the Broom Stick:

  • Cut 6 short strings of licorice and attach together with black candy melts. Trim off non-chocolate part of Pocky stick and attach to bristle portion. Let set.
  • Make the Letters.
  • Make the House Points:

  • Cut off the wooden round tip on each rock candy stick.
  • Leave one color as is. Carefully trim away parts of the other three candy colors so that you have four different heights.
  • Make the Fireplace:

  • Shape and mold the marshmallow treats into a flat 4x4 inch square onto a parchment-lined baking sheet. Trim into the shape of a fireplace. Spray with edible black spray and let set.
  • Make the Platform Numbers:

  • Using a printed template, pipe 9 ¾ with candy melts. Let set.
  • Make the Wand:

  • Place licorice on a parchment-lined baking sheet. Pipe small dots onto licorice, equally spaced apart. Let set.
  • Make the Brick Wall:

  • Arrange square marshmallows on a parchment-lined baking sheet. Spray with edible red spray and let set.
  • Assemble Top Tier:

  • Place the small tier on a turntable. Frost the sides with a layer of buttercream, leaving the top bare.
  • Pick up the cake and roll in the candy rocks to coat the sides. Place the cake back on the turntable and frost the top.
  • To attach the castle buildings, spread a little buttercream over placement area and pipe on a bit of white candy melts. Gently press in the castle buildings. Fill in bare areas with candy rocks and set aside.
  • Assemble Bottom Tier:

  • Place the large cake tier on a turntable. Frost the top and sides with a layer of buttercream.
  • Press the red marshmallows into the sides of the cake in a brick pattern.
  • Using the candy melts as glue and pressing to adhere, attach the fireplace, letters, wand and blue sour strings, red and yellow striped candy belt, and 9 3/4 numbers.
  • Insert a straw in the back area of the top of the cake. Lift up and cut so that the straw matches the height of the cake. Repeat until you have inserted five straws total, spaced equally in the back of the cake. The tiers will be stacked up along the back of the cake instead of the center.
  • Assemble Middle Tier:

  • Place the middle cake tier on a turntable. Frost the sides with a layer of buttercream, leaving the top bare.
  • Pick up the cake and roll in the green sprinkles to coat the sides.
  • Place the cake back on the turntable and frost the top. Cover with sprinkles.
  • Insert a bubble tea straw in back area of the top of the cake. Lift up and cut so that the straw matches the height of the cake. Repeat until you have inserted four straws total, spaced equally in the back of the cake.
  • Assemble the Cake:

  • Place the bottom tier on a large blue cutting board or cake board. Stack the middle tier on top where the straws are.
  • Pipe green frosting on the top of the bottom tier using the grass tip.
  • Push the wooden sticks of the colored rock candy in the top of the bottom tier so that’s it’s positioned in front, on the left side, of the middle tier.
  • On the front of the middle tier and using the candy melts as glue, attach the three peach rings upside down so that the yellow side faces out. Trim the Pocky sticks to fit underneath the peach rings and attach. Attach the broom stick.
  • Stack the top tier on top where the straws are.
  • Decorate cake with spell books and potion pipettes. You can stack or lean the books against one another. The pipettes can be stuck directly into the cake.

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