app.py

from flask import Flask, render_template, abort, current_app
app = Flask(__name__)

@app.route('/')
def home():
    return 'home'

from bp import mod
app.register_blueprint(mod,cows='moo')

if __name__ == '__main__':
    app.run(debug=True)

bp.py

from flask import Blueprint, jsonify, current_app

mod = Blueprint('test', __name__, url_prefix='/test',template_folder='templates')

@mod.record
def recorder(test):
    mod.options = test.options

@mod.route('/')
def test():
    return jsonify(mod.options)