It is stated that One glass of matcha is the equivalent of 10 glasses of green tea in terms of nutritional value and antioxidant content.
To make one cup of Matcha Green Tea, use about 2g (1/2 tsp) of the powder for every half to one cup of water. Here are two nice links outlining the steps.
Re: Blood pressure - do a search for "blood pressure" under the recipes tab here on NutriLiving and you will see several come up! Almost all NutriBlasts are great for reducing blood pressure since they are filled with foods high in fiber, potassium and antioxidants and void of excess sodium, sugar and highly processed, nutrient-void food-like ingredients :)