1. the first word also describes a type of Welsh pastry
2. the second word begins with a soft mutation

I love this 'conceptual' use of the first word which means speckled. You really get the imagery of what's happening in your brain. On the grammatical side: the second word is enjoying a mutation caused by the first word since the word order is unusual (usually you would describe things backwards like 'house red' and 'dog fat'