I need some help reaching cal goal!

I am a breast feeding mum and have been researching and should be eating 2400 cals a day, I am trying this out for a couple of weeks to see if it does give me a loss or not, I may tweak things if I don't but not to an extent that it effects things for my baby!. I am not new to loosing weight by any means, and know how to eat clean and healthily, however this was always done with a min of 1200cals and eating half of any exercise cals I earnt. So now my dilemma is that eating clean or even healthily I am not meeting the calorie allowance. Today I've had around 1600 and that includes eating chocolate. I'm now sat here thinking I should just eat what ever is at hand to up my intake :(

How can I increase my intake without adding hugely to my portion sizes?

whole eggs

salmon

coconut milk 

coconut oil

nuts

seeds

natural nut butter

avocado

sardines

olives

protein powder

starchy veg (sweet potatoes, carrots, butternut squash, white potatoes, turnip..etc)

sprouted grains/legumes

tempeh

full fat organic yogurt

chicken thighs/legs

grass fed meat

organic butter or ghee

olive oil

dried fruit

dense/sugary fruit (melon, pineapple, banana...etc)

good quality dark chocolate

Cooking with olive, coconut and macadamia nut oils will help you up your calories without really increasing portion sizes. You can also use flax seed oil as a dressing to salad and steamed, grilled, broiled vegetables. You can also add sesame seeds to dishes and snack on higher calorie foods such as avocados, salmon, sardines, mackerel, olives, etc. Nuts and seeds will also help you increase your calories, healthfully.