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1
To prepare the starter, knead the flour, the water, and the brewer's yeast together and allow the starter to rest at a temperature of 18C.
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2
To prepare the pre-ferment, knead the water, the flour, the brewer's yeast, and the tangerine zest together and allow it to rest in the refrigerator at 5C.
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3
To prepare the first kneading at 8 A.M., take the pre-ferment out of the refrigerator.
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4
Dissolve 8 grams of yeast in 30 milliliters of warm water and 30 grams of flour in the mixer bowl.
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5
Allow the mixture to rest for 30 minutes.
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6
Add 200 milliliters of water, 150 grams of sugar, and 200 grams of flour, knead on low speed.
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7
Add the pre-ferment, 100 grams of flour and the starter, and knead well.
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8
Add the 4 egg yolks, 1 egg, 150 grams of sugar and 320 grams of flour with this sequence: 1 egg yolk and 50 grams of sugar at a time, and knead to incorporate; add some flour and knead well, continuing to add the remaining egg yolks, egg, sugar, and flour. Knead at low speed.
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9
Add 300 grams of softened butter gradually allowing it to be incorporated slowly.
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10
Place the dough on a work surface and knead by hand.
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11
Allow the dough to rise until it triples in size at 30 to 35C.
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12
To prepare the second kneading at 1 P.M., melt the white chocolate, the milk, and the salt in a small saucepan over a double boiler.
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13
Place the zest of 2 tangerines and 1 orange in a food processor with some sugar to grind.
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14
Turn the mixer on to low speed and begin kneading.
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15
Begin adding the egg yolks, the remaining sugar, honey, chocolate in two additions with the salt, the vanilla extract and the flour as before with the first kneading.
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16
Knead well, then add the remaining butter.
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17
Last, add the lightly floured candied orange.
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18
Let the dough rest for 1 hour.
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19
Place the dough into three 1 kilogram colomba pans, cover with plastic wrap and let the dough rise at 35C until it reaches the edge of the pan.
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20
Prepare the icing with egg white and sugar and coat the top of the cakes, sprinkle with almonds and sugar grains.
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21
Bake at 180C for approximately 40 minutes.
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22
Remove the cakes from the oven and let cool on a wire rack.