Neat idea, looks pretty tasty! The recipe is translated from Japanese, so a little experimentation might be required.
Ingredients: 600g loaf (206 x 108 x100h)
230g bread flour
70g cake flour
milk + 1 yolk = 210g (I used skim milk)
18g unsalted butter (I used 20g)
8g green tea powder dissolved in 10g boiling hot water
8g cocoa powder dissolved in 8g boiling water
1. Heat up milk and yolk to temperature of 38C. (I beat the yolk lightly with milk and send it to the microwave on HIGH for 30 seconds).
2. Put everything in bread machine and set to dough cycle. Let it knead for 20 minutes. Stop the cycle and restart the dough cycle and let it knead for another 15 minutes.
3. Divide dough (about 560g) into 3 parts: 75g for the chocolate, 210g plain and the rest of the dough which is less than 280g for the green tea.
4. Add chocolate to the 75g dough and knead till the colour is even. Add green tea mixture to the 280g dough and knead till colour is even. (I did this step manually).
5. Prove all 3 pieces of doughs on separate greased plates covered loosely with oiled cling wrap for 30 – 40 minutes.
6. Punch air out of dough and prove for another 20 – 30 minutes.
7. Use 90g plain dough for the face and 2 pieces of 27g chocolate dough for the eyes. (Refer to photo guide in Step (7) in TARO’s site).
8. Fill the hollow of the eyes with 30g plain dough. (Refer to photo guide in Step (8) in TARO’s site).
9. Roll remaining plain dough over the patterned dough. (Refer to photo guide in Step (9) in TARO’s site).
10. Divide the remaining chocolate dough into 2 pieces (17.5g each) for the ears. (Refer to photo guide in Step (10) in TARO’s site).
11. Use 70g of the green tea dough to fill up the hollow between the ears. (Refer to photo guide in Step (11) in TARO’s site).
12. Wrap the rest of the green tea dough all around the patterned dough. (Refer to photo guide in Step (12) in TARO’s site)
13. Place dough into a well-greased loaf pan and cover it with a lid and prove for 50 – 60 minutes in an enclosed area eg. microwave oven.
14. Bake at 200? for 25 – 30 minutes.